Why have YouTubers ceased reuploading videos to alternative platforms around December 2023?

I prefer not to support Google, so I’ve been using alternative platforms. However, I’ve noticed that the YouTubers I follow have stopped reuploading their videos to these platforms. Has anyone else observed this? What could be the reason behind this change?

Relevant links: Brodie Robertson eBuzz Central Foundation for Econ. Education Upper Echelon Gamers