I'm working on a site (https://panoptic.live/) designed for watching multiple livestreams from different platforms at once.
You can drag and drop links from YouTube, Twitch, TikTok, or Kick.
You can watch multiple streams at once in a grid and/or navigate quickly and smoothly from one single stream to another.
You can add or remove streams, save mixes for later, and share mixes via URL.
It works best on a really big screen and it's decent on a laptop. Phones aren't really supported at this point. If you have a large, secondary monitor off to the side, that's ideal for passively viewing a lot of streams. Happy to answer any questions.