I remember using Trillian to overcome the MSN/AIM/ICQ boondoggle and it didn't take long until all of those hosts started to fight back by complicating their protocols making it hard for the Trillian devs to emulate authentic clients.

The truth is that Youtube doesn't want creators to own their identities because Youtube wants to own the viewers and tell them to watch whatever will make Youtube more money. Kind of the same as why reddit believes it has a moral authority to take over and control a subreddit that was built by a moderator.

Youtube wants viewers to be "Youtubers" not "Mark Rober viewers" or whatever. Otherwise Youtube becomes some kind of free hosting service. But they CAN help new creators get discovered by vast quantities of viewers if they so choose, which they offer hypothetically in return for a piece of the ad revenue which they can secure when the viewers are kept as Youtubers.

Youtube will work hard to break any 3rd party front end such as this one for sure.

Anyways, I hope GrayJay can attract a good following before the platforms figure out how to block them.

The first team or company who figures out how to let content creators own their identities completely - ActivityPub style on their own instances - combined with someone who figures out a compensation/revenue system and a way to drive viewers will probably be the Youtube/Twitch killer.

Actually, now that I think about it, what's the core difference between everyone spinning up a WordPress that's RSS fed into a reader?