Yep this is broken and its makes me crazy

Okay I found a fix to this in the 'Just Dance' Vrchat world. You have to go to this website: https://yt-dl.org/ then click the 'youtube-dl.exe' to download it. Then you have to go to the drive where you have VRchat installed follow through here: D:\Steam\steamapps\common\VRChat\VRChat_Data\StreamingAssets

and then you just have to replace the 'youtube-dl.exe' with the one you just downloaded.

Hope this helped!

Yes it looks like youtube might have modified a token name they have a patch they are working within github to update to the new account_playback_token token. I see them working on a release 2019.04.24 that fixes this bug on the youtube-dl site.

Completely stopped all videos from playing including the tutorial room.

Possible fix: https://github.com/ytdl-org/youtube-dl/issues/20758#issuecomment-486016882

It looks like you are using the most recent version of youtube-dl 2019.04.07 and from what I can see on github this version has a problem ""Token" parameter not found" You may want to look at reverting to an older version or updating as soon they have resolved the bug.

The karaoke central world is Broken. There are a ton of people wanting to sing and nothings loading on the main screen. From a developer to another developer please fix this. Thanks in advance!

Yep I can confirm I just tried videos in several Karaoke worlds and even the VRchat Home world. They worked yesterday before the update.