It is a fact that Google/Youtube gave censorship control to governments directly, years ago - the corporations may not even be involved in the blocking as it is handled by government agents directly.

I am currently seeing all of my Facebook comments on friends' posts being marked as spam automatically and in December they blocked me from posting to all groups. None of this was ever explained - presumably because they have no valid justification for it.

The best we can really do is rely on the free / blockchain based options such as D.tube and use Youtube ONLY to advertise D.Tube.

A Wise option is to make vidoes for D.Tube and upload only a minute long version to Youtube that cannot be said to contain any kind of controversial material at all - simply as an advert to drive people to D.Tube.