The whole discussion is moot, as YouTube and Twitter are corporations that do whatever the hell they feel like. But it’s still around on non-mainstream platforms and will continue to be. The question is do we have a right to see them at all? My answer is yes.
For the record, I didn’t watch the video. It hits a little too close to home. But I will fight for the right to watch it, you bet I will. You can’t force corporations to serve human rights instead of human needs, though. If it’s important to you, download it before whatever platform you’re viewing it on takes it down.