This does not seem to be a Brave related problem: https://www.reddit.com/r/AskReddit/comments/b77tj0/liveleak_not_showing_comments_lately_anybody_know/
Are you logged in? I just created an account and after that some videos suddenly had comments. Your video still shows no comments though.
Edit: Tried with Chrome, didn’t work either. Seems to be a LiveLeak problem. Logging in shows you comments on more videos, still not on all.
Edit2: Maybe show a different video as an example which does not contain violence.
Yeah, you could be right.