This comment section is wild.
The videos are up. Microsoft and Google weren't meeting in secret backrooms to censor this one channel. The most likely explanation is that a competing channel was trying to move their own videos up in the rankings by mass-reporting other videos on the topic.
It's a growing problem on social media platforms: Cutthroat channels or influencers will use alt accounts or even paid services to report their competition. They know that with enough reports in a short period of time they can get the content removed for a while, which creates a window for their own content to get more views.
The clue is the "risk of physical harm". People who abuse the report function know that the report options involving physical harm, violence, or suicide are the quickest way to get content taken down.