I'm not watching a 20 minute video on the topic, but there is a user in an HN comment[1] stating links to debian.org and qubes-os.org were removed by facebook.
Thus Facebook is not censoring Linux discussions or Linux content, what DistroWatch claimed, it blocks linking to what Facebook deems as malicious links (correctly or incorrectly), something a lot of software does these days.
This is what the yanks call "a complete nothing-burger".
I think the complaint is that it's not really a "comment", so much as it's a link to Bryan's own 20 minute video talking about it. It comes off as an annoying bit of self-promotion.
Though I will admit that Bryan is just a deeply unlikable human who is generally under-informed-at-best on any given subject that he's talking about, so people might be looking at it more cynically than if someone else posted it.
[1] https://news.ycombinator.com/item?id=42840143