Or ‘What is PeerTube lacking that you simply cannot do without?’
I believe it’s a safe assumption that fediverse users want to move away from the monopolies and closed gardens so often associated with video streaming, and yet it’s not a task that’s ever been made easy. Maybe an ounce of inspiration is the cue we need, and so my question to you is; What’s Stopping you from using PeerTube?
Is it currently possible to view a feed of all your followed instances? That would solve 90% of my problems.
Then yeah, a basic discoverability algo wouldn’t be rocket science honestly. People have been making these for decades. You could just use a tag based system where creators include tags in their videos and those would invite similarly tagged videos to appear in your feed.