I understand that now it is a mainstream to use modern technology, but why YRX needs the blockchain? I think, that the platform would work fine without it. Besides, its introduction only increases development costs and timescales. It would be better to have it introduced in the future, if it is that much necessary..
Maybe you should for yourself first make a list with the advantages of a blockchain over other systems and then brainstorm why a decentralized version of Youtube can make a lot of sense. There is a ton of advantages.