This is impractical due to YouTube's algorithm. If y people watch your content on alternative sites that would otherwise have watched on YouTube, this reduces t

This is impractical due to YouTube's algorithm. If y people watch your content on alternative sites that would otherwise have watched on YouTube, this reduces the algorithm's score and could result in x : (x > y) less views on YouTube due to reduced placement. It's probably not a problem at small numbers of views, but if you actually started getting significant views on alt sites, you would be heavily incentivized to pull your content back to YouTube exclusively. The network effects are just too strong. Even if a few very devoted creators stick to using alt sites at personal cost, 99% of creators will remain exclusively on YouTube and the alt sites will not be able to compete on content. TLDR: A few people may do it, but it won't scale.