For Youtube / Youtube Live:
People who can no longer launch videos from youtube (even in chromium) here is the solution:
GModCEFCodecFix[github.com](it fixes many chromium issues)

I don't know if this can be a problem but if you install this fix, remember to check from time to time if a new version is available


For Twitch :
It will no longer be possible to read the lives on the media player directly because the API allowing to retrieve the information of the streamer is obsolete, the new version will not be in my opinion not implementable because it comes with a number of requests limited per minute: 30req/min (and given the number of users retrieving a live stream on this addon, it would be complicated). The only solution would be to have a no-api version.