Same thing just happened to me.
I think it’s to do with the new cookie approval system (at least I guess it’s new, as I hadn’t gotten that popup before).
I got the popup and accepted the default settings, which actually (surprisingly) disable most of the cookies. Disabling those seems to block the video and comments.
That said, I also had to fiddle around with uBlock and also Firefox’s built in blocker, as each of them was doing some blocking.
I think I went with enabling the ‘functional cookies’ section, and disabling uBlock. (The ‘cookie settings’ link is in the footer if you need it).
It might be some other combination of factors for you though…