twitchtheater.tv I actually wasn't aware until I checked just now. For YT you have to put the full link. (also i realize in its thumbnail description here it literally tells me it does YT)
This has been my preferred multi for a while now.
twitchtheater.tv
TwitchTheater.tv
Multistream, multivideo, and multichat for Twitch, Youtube, and others (mobile and desktop).
