A lot of channels had to avoid even saying the word Covid. I only saw it return recently to use at the end of last year. There were a variety of channels banned that shouldn't have been such as some talking about Long Covid.

Every opinion different from the opinion of "authorities". They documented it here:

https://blog.youtube/news-and-events/managing-harmful-vaccin...

From the two links in the post, Google fleshes it out in great detail, with many examples of forbidden thought.

Saying lab leak was true

According to Google's censorship algorithm, Michael Osterholm's podcast (famous epidemiologist and, at the time, a member of President Biden's own gold-star covid-19 advisory panel).

https://x.com/cidrap/status/1420482621696618496 ("Our Osterholm Update podcast episode (Jul 22) was removed for “medical misinformation.”" (2021))

Most ironic thing I've ever seen. I still recall it perfectly, though it's been four years. Never, ever trust censorship algorithms or the people who control them: they are just dumb parrots that suppress all discussion of an unwanted topic, without thought or reason.