How to change Audio Output Device on Youtube (Chrome)

Youtube select audio output.js

//References
/*
https://webrtc.github.io/samples/src/content/devices/multi/

https://www.youtube.com/html5?gl=JP&hl=ja
https://webrtc.github.io/samples/src/content/getusermedia/gum/
https://www.youtube.com/html5?gl=JP&hl=ja

Audio Output Devices API
https://www.w3.org/TR/audio-output/#htmlmediaelement-extensions

https://www.chromestatus.com/feature/4621603249848320
https://developers.google.com/web/updates/2015/10/media-devices
*/

//Steps.
/*
A:Get permission required to use setSinkId() (change output device) at first.
  to do this, use navigator.mediaDevices.getUserMedia() to get permission from user.
  
  unless this process setSinkId() raise permission error.
  
B:Use navigator.mediaDevices.enumerateDevices() to enumerate devices.
C:Find video elements and call setSinkId() for deviceId found in B.
*/



/////////////////////////////
//sample console input in youtube.
////////////////////////////

constrains = {audio:true, video:true}

navigator.mediaDevices.getUserMedia(constrains)

gotDevices = function(deviceInfos) {

  for (var i = 0; i !== deviceInfos.length; ++i) {
    var deviceInfo = deviceInfos[i];

    if (deviceInfo.kind === 'audiooutput') {
      console.info('Found audio output device: ', deviceInfo.label, deviceInfo.deviceId);
    } else {
      console.log('Found non audio output device: ', deviceInfo.label,deviceInfo.deviceId);
    }
  }

}

navigator.mediaDevices.enumerateDevices().then(gotDevices)

//now callback will show device names and deviceId.


v = document.getElementsByTagName("video")[0]

v.sinkId

v.setSinkId("a418acde582382574452caf2d51df1a78e7f1d2f65e5e5c129d26ed7850317a9")
v.sinkId

The script didn't work to me, but I was using this google chrome extension instead "Audio pick"

https://chrome.google.com/webstore/detail/audiopick/gfhcppdamigjkficnjnhmnljljhagaha/related

Since neither Youtube, nor any browser provides a way to change output device this is very useful. I get that this is extremely niche case, but come on, everything but UI is already there. Thank you for sharing this!

@Domin6o thanks!