Defnitly a hard one. Since over such a long time a huge amount of high quality content creator like TEDx, Veritassium and many more fed the Network of youtube so consitantly. And it is such a superpower almost no professional video creator will not upload to youtube.

With this given it is very hard a real competitor could come up. But I have faight that through integrating youtube or something like it a plattform could get popular fast while delivering everything youtube got.