That is still Youtube. Google can take down videos they don’t like. The point of decentralization is to spread power so that no single entity can censor anything. (Although, collectively, they can still stop unwanted content, such as hate speech, but not something that one instance admin can do. People can always repost to another instance.) Using a front-end to access Youtube doesn’t not change the fact that Google is still in control. I mean, I could use Firefox + uBlock Origin + a VPN to browse Youtube and achieve the same thing as whatever front-end you use.