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Summary

Frequency's Javascript video player is built as an end all solution for short form video to support a myriad of third party players, media formats, advertising requirements, financial settlements, and reporting. This document describes the technical capabilities of the player.

Player can be loaded as html from https://static.frequency.com/player/<version>/index.html or as standalone js file http://static.frequency.com/player/<version>/_assets/interface.js

PlayerLite can be downloaded as javaScript file from https://static.frequency.com/player/<version>/_assets/playerLite.js

Conviva builds can be found using <version>_conviva

Version History

Version #	Description	Release Date
3.0.12	Changes: fix IE11 playhead issues	April 23, 2018
3.0.11	Changes: fix safari problems with autoplay and mute	February 21, 2018
3.0.10	Changes: fix safari problems with autoplay and mute conviva postfix dropped	February 12, 2018
3.0.9	Changes: conviva parameters in constructor	November 7, 2017
3.0.8	Changes: fix Promises on legacy IE browsers	November 2, 2017
3.0.7	Changes Fixed issue where onprogress event was sent after ended event buffering fix	October 27, 2017
3.0.5	Changes Added a work around for fetch commands when a browser does support it natively Enhanced error management to ignore undefined errors so they are not returned in the OnError event	October 27, 2017
3.0.2	Changes Remove testrunner	October 23, 2017
3.0.0	Changes: New method for loading channels feed New method for loading video Breaking changes: loadVideo method and video object constructor expecting video_id string instead of object	September 5, 2017
2.2.0	Changes: deprecated loadVideo method additional controls elements removed Dailymotion and Vimeo players Bugfixes: autoplay issue on ios events memory leaks	September 1, 2017
2.1.2	Changes Ad fixes	August 19, 2017
2.1.1	Changes Ad fixes	July 19, 2017
2.1.0	Changes support for VAST error trackers support for DNT support for forcing ad delivery protocol maximum and minimum Ad resolution support maximum and minimum bitrate Ad support additional player controls UI New events onActivity onAd Bugfixes: State PLAYING not received after SEEKING Edge Incorrect handling for SEEKING status for some videos. Video doesn't pause at starting playback Watch10 request is sent after forwarding the video Player doesn't playback picked video after advertising ends. Memory leaks for advertisements	July 11, 2017
2.0.4	Bugfixes: API url is not supported in constructor call	March 23, 2017
2.0.3	Bugfixes: "autoplay" is ignored playerLite memory leaks VAST impression support	March 16, 2017
2.0.2	Bugfixes: Player does not emit onVolumeChange event during playing ads Current time is not equal to Duration on video End Video doesn't pause at starting playback Infinite SEEKING state after advertisement "autoplay" is ignored Breaking changes: please provide source instead of source_id in video object for ads	February 22, 2017

Browsers & Device Support

Frequency's player is supported on the following browsers and devices.

Desktop Browser	Version	Mp4	HLS	YouTube	Vimeo	DailyMotion
IE	10+	Yes	No	Yes	Yes	No
Edge	13+	Yes	Yes	Yes	Yes	Yes
FF	30+	Yes	41+	Yes	Yes	Yes
Chrome	35+	Yes	Yes	Yes	Yes	Yes
Opera	30+	Yes	Yes	Yes	Yes	Yes
Safari	6.2+	Yes	Yes	Flash	Yes	Flash

Mobile OS	Version	Mp4	HLS	YouTube	Vimeo	DailyMotion
Android	4.4+	Yes	Yes	Yes	Yes	No
iOS	6.0+	Yes	Yes	Yes	Yes	No
Windows Phone	8.1+	Yes	No	Yes	Yes	Yes

Players & Formats

The Frequency Javascript video player provides a Javascript class and a set of constructs that makes short form video playback with advertisement a simple task. The supported video formats are:

Player / Format	Example
Youtube	http://www.frequency.com/video/game-of-thrones-season-6-trailer-2-hbo/253199983?cid=4-8621
H264	http://once.unicornmedia.com/now/stitched/mp4/8e6db0ba-80b7-4c02-b328-07d1af9ee5d3/7aab0ba9-921d-4d44-8ee9-938049fb3572/a07db314-1579-44ce-93cd-ee9c63cfc294/3eccdfc7-4e10-4f4e-b07f-17ab769ba565/content.mp4
HLS	http://once.unicornmedia.com/now/adaptive/m3u8/95286106-b310-4123-abd8-76e9b8fa5ccb/2d45f3f5-1836-46b2-9b48-125be611c8eb/be919c0f-034f-4008-b288-3e7ff1523002/content.m3u8?UMLITERAL%3Dfkey%2C14%26guid

Fullscreen API support

The Frequency Javascript video player provides wrapper around Fullscreen API. Supported browsers:

Desktop Browser	Version
IE	11+
Edge	12+
FF	10+
Chrome	15+
Opera	15+
Safari	5.1+

Mobile OS	Version
Android	-
iOS	-
Windows Phone

Demo

Frequency Player Demo

Player flow diagram

Home > Javascript Video Player > player_diagram.svg

To operate correctly player requires connectivity to 3 additional services:

API
Ad decisioning server (DS)
3rd party services for VAST events

During player initialisation player is checking if provided session is still valid by calling API:

curl 'http://qa-lgi-api.frequency.com/api/2.0/auth/session' -H 'x-frequency-auth: bdd6c80b-5fb8-4957-b140-a0c26747e45b' -H 'x-frequency-deviceid: 58f67176-743f-d762' --compressed

{  
   "country":"PL",
   "user_agent":"Paw/3.1.7",
   "device_id":"58f67176-743f-d762",
   "token":{  
      "token_access":"bdd6c80b-5fb8-4957-b140-a0c26747e45b",
      "token_refresh":"0c6d9018-8f4a-483b-9e35-dd21f2715748",
      "roles":[  
         "ROLE_ANONYMOUS",
         "ROLE_USER"
      ]
   },
   "app_name":"telenet",
   "app_id":"6394703612760826080",
   "user_id":"6410435873178213705",
   "session_id":"035c2005-761a-4c85-a1f6-9e3640c743ea",
   "account_id":"6113878517855336672"
}

When session is valid player stores account_id for future DS calls and is ready to load video feed. This is done by executing one of the functions:

loadVideo
loadChannel
loadPlaylist

Example call looks like one below:

curl 'http://qa-lgi-api.frequency.com/api/2.0/channels/6341811119618533518/videos' -H 'x-frequency-auth: bdd6c80b-5fb8-4957-b140-a0c26747e45b' -H 'x-frequency-deviceid: 58f67176-743f-d762' --compressed

{  
   "videos":[  
      {  
         "title":"Jeff Sessions Says U.S. May Use DNA Tests to Verify Family Relationships at Border",
         "description":"Attorney General Jeff Sessions may use DNA tests to verify the relationship between children and adults who cross the border illegally! Rob Smith (@robsmithonline) has all the details.",
         "resolution":"1280x720",
         "resolutions":null,
         "duration":59,
         "source":"Veuer",
         "score":0,
         "channel":{  
            "title":"Veuer",
            "channel_id":"6341811119618533518",
            "image_url":"https://qa-freq-images.frequency.com/channel/1rbhzt34412fd16ps1zgrx35f/original/1rbhzt34412fd16ps1zgrx35f.jpg"
         },
         "video_id":"6415162182727646499",
         "content_partner_id":null,
         "image_url":"https://qa-freq-images.frequency.com/video/1p1gxhsswx8re1xi6lyzl1srs/original/1p1gxhsswx8re1xi6lyzl1srs.jpg",
         "media_url":"https://qa-freq-media.frequency.com/videos/6415162182727646499/C3VHmxAgS-G4.mp4",
         "media_type":"h264",
         "media_types":[  
            "h264",
            "hls"
         ],
         "deep_link":"frequency://video/6415162182727646499",
         "source_id":"video7316576222416856667",
         "source_url":"https://qa-freq-media.frequency.com/videos/6415162182727646499/1p1gxhsswx8re1xi6lyzl1srs.mp4",
         "meta_tags":null,
         "referrer_link":"http://www.frequency.com/video/jeff-sessions-says-u.s.-/6415162182727646499?cid=6341811119618533518",
         "ad_tag":null,
         "ad_cue_points":[  
            0
         ],
         "date_publish":"2018-06-20T11:09:00Z",
         "date_available":"2018-06-20T11:28:26Z",
         "date_expired":null,
         "last_updated":"2018-06-20T11:28:26Z"
      },
      ...
   ],
   "page":{  
      "page_id":null,
      "page_size":30,
      "page_offset":"1",
      "page_mark":null
   }
}

For selected video player is creating DS call to fetch ad info. Request contains:

video data
session data
counters object (see below)
additional ad parameters described in plugins section of player

curl 'http://qa-freq-ad-eu.frequency.com/2.1/ad_request' -H 'Content-Type: application/json; charset=utf-8' -H 'Accept: application/json' --data-binary '{"IMA":false,"session":{"account_id":"6113878517855336672","device_id":"58f67176-743f-d762","token_access":"bdd6c80b-5fb8-4957-b140-a0c26747e45b","user_id":"6410435873178213705"},"counters":{},"video":{"title":"Jeff Sessions Says U.S. May Use DNA Tests to Verify Family Relationships at Border","description":"Attorney General Jeff Sessions may use DNA tests to verify the relationship between children and adults who cross the border illegally! Rob Smith (@robsmithonline) has all the details.","resolution":"1280x720","resolutions":null,"duration":59,"source":"Veuer","score":0,"channel":{"title":"Veuer","channel_id":"6341811119618533518","image_url":"https://qa-freq-images.frequency.com/channel/1rbhzt34412fd16ps1zgrx35f/original/1rbhzt34412fd16ps1zgrx35f.jpg"},"video_id":"6415162182727646499","content_partner_id":null,"image_url":"https://qa-freq-images.frequency.com/video/1p1gxhsswx8re1xi6lyzl1srs/original/1p1gxhsswx8re1xi6lyzl1srs.jpg","media_url":"https://qa-freq-media.frequency.com/videos/6415162182727646499/C3VHmxAgS-G4.mp4","media_type":"h264","media_types":["h264","hls"],"deep_link":"frequency://video/6415162182727646499","source_id":"video7316576222416856667","source_url":"https://qa-freq-media.frequency.com/videos/6415162182727646499/1p1gxhsswx8re1xi6lyzl1srs.mp4","meta_tags":null,"referrer_link":"http://www.frequency.com/video/jeff-sessions-says-u.s.-/6415162182727646499?cid=6341811119618533518","ad_tag":null,"ad_cue_points":[0],"date_publish":"2018-06-20T11:09:00Z","date_available":"2018-06-20T11:28:26Z","date_expired":null,"last_updated":"2018-06-20T11:28:26Z"},"params":{"url":"//qa-freq-ad-eu.frequency.com","minBitrate":100,"maxBitrate":5000,"maxResolution":"720p","minResolution":"720p","deliveryProtocol":"https","format":"video/mp4","CHILD_DIRECTED_CONTENT":false},"device":{"DNT":1,"advertisingId":"","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36","connectionType":"wifi","countryCode":"US","timeZone":-2,"locale":"en-US","language":"en","capability":["VPAID","VAST","MRAID"],"category":"desktop"},"application":{"name":"Web","domain":"com.frequency","storeLocation":"","bundle":"com.frequency.player-3.1"}}' --compressed

This will produce JSON containing ad data or empty response if ad should not be displayed (more below)

{
    "VAST":{
    "version":3,
        "ad":{
        "id":"94691571",
            "inLine":{
            "adSystem":"GDFP",
                "adTitle":"Mountain Dew NBA",
                "description":"Mountain Dew NBA ad",
                "error":[
                "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoplayfailed[ERRORCODE]"
            ],
                "impression":[
                "http://pubads.g.doubleclick.net/pcs/view?xai=AKAOjsvdVj_cxz0fwuQcC65H3U2j_GegtDEvbT_z_JWt2zrFC361C4AJM885ooCz66XTeOYJ28lg_SyEA7nDuK61IZWXsevp_8GpXHilXGR9wap0vrndyInz7zpGviqyfX6qBACXqu1GjJ4CroW1Kdc55dS981D_J4hC_ZMspaDhd3MYAVL_6BX2pNXXoXjxUybye0VFtNdw9eAOwqG0HtEX_gsLO1ZeTzjFiEccluIVOC4&sig=Cg0ArKJSzEscm6_-DknEEAE&adurl="
            ],
                "creatives":[
                {
                    "id":"107074364451",
                    "sequence":1,
                    "skipoffset":5,
                    "duration":30,
                    "trackingEvents":{
                        "start":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=part2viewed&ad_mt=[AD_MT]"
                        ],
                        "firstQuartile":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoplaytime25&ad_mt=[AD_MT]"
                        ],
                        "midpoint":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoplaytime50&ad_mt=[AD_MT]"
                        ],
                        "thirdQuartile":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoplaytime75&ad_mt=[AD_MT]"
                        ],
                        "complete":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoplaytime100&ad_mt=[AD_MT]"
                        ],
                        "mute":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=admute&ad_mt=[AD_MT]"
                        ],
                        "unmute":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adunmute&ad_mt=[AD_MT]"
                        ],
                        "rewind":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adrewind&ad_mt=[AD_MT]"
                        ],
                        "pause":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adpause&ad_mt=[AD_MT]"
                        ],
                        "resume":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adresume&ad_mt=[AD_MT]"
                        ],
                        "fullscreen":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adfullscreen&ad_mt=[AD_MT]"
                        ],
                        "creativeView":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=vast_creativeview&ad_mt=[AD_MT]"
                        ],
                        "exitFullscreen":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=vast_exit_fullscreen&ad_mt=[AD_MT]"
                        ],
                        "acceptInvitationLinear":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=acceptinvitation&ad_mt=[AD_MT]"
                        ],
                        "closeLinear":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=adclose&ad_mt=[AD_MT]"
                        ],
                        "skip":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=videoskipped&ad_mt=[AD_MT]"
                        ],
                        "progress":[
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=video_skip_shown&ad_mt=[AD_MT]",
                            "http://pubads.g.doubleclick.net/pagead/conversion/?ai=BHF2xXE0qW6CmD4qNxwLw_avABeHCp5JFAAAAEAEgq9bfKDgAWKPIhPGOA2Dp5JqP8Bq6ARMzMzZ4MjY5LDY0MHg0ODBfeG1syAEFwAIC4AIA6gIQLzEwNTkzNDA1MS9sZ2kuLvgC8NEekAPIBpgDrAKoAwHQBJBO4AQB0gUFEPPBky2QBgGgBiOoB5jOG9gHAeAHH9IICQiA4YBwEAEYAw&sigh=jqiKXXJbZho&label=video_engaged_view&ad_mt=[AD_MT]"
                        ]
                    },
                    "adParameters":"deployment=devsite,sample_ct=skippablelinear",
                    "mediaFiles":[
                        {
                            "id":"GDFP",
                            "delivery":"progressive",
                            "width":"1280",
                            "height":"720",
                            "type":"video/mp4",
                            "bitrate":"1383",
                            "scalable":"true",
                            "maintainAspectRatio":"true",
                            "url":"http://redirector.gvt1.com/videoplayback/id/133827f22597d9ad/itag/22/source/gfp_video_ads/acao/yes/mime/video%2Fmp4/ip/0.0.0.0/ipbits/0/expire/1529520572/sparams/ip,ipbits,expire,id,itag,source,acao,mime/signature/64EFDDA91086C08874D6578EC67670819C6CFECC.08E71F290F6BA79E41C2E53A3F5E5838965D955F/key/ck2/file/file.mp4"
                        }
                    ],
                    "videoClicks":{
                        "clickThrough":"http://pubads.g.doubleclick.net/pcs/click?xai=AKAOjssrwKE5tRgppmtIua9Gbn5CFpK-fKKhsF9mc-YDeYK4Eycg3BShVD9mapIpOs4De5c7SSHPIVjD848DTHsiLNKEyH2hRFM8z1SQCRSsHXNTsUIvXSPGeiqldBZ3xRNV4ml3g-hibRWfaA7dAsMdAS2kem-rmkLaxMD7HAc_Kl_FLoBowTbJYLFX-Sz2ZXGssEDaHn4Fpc2SK3xvblW2h6fjZgiXxAF093q7&sig=Cg0ArKJSzHcKKy8z9YPN&adurl=http://www.frequency.com/"
                    }
                }
            ]
        }
    }
}
}

All 3rd party trackers needs to be handled by player:

trackingEvents
impressions
errors (with appropriate error code)

More information about above trackers can be found in iAB VAST 3.0 specification

Counters object - DS can serve advertisements with different frequencies depending on video source. Counters object contains information about already played videos and their sources. After playing video from above example next DS call should have:

counters:{
   Veuer: 1
}