When I first go to the page, there are blank squares where suggested videos should be right before a sectioned area of the page (such as Trending or C-19 News). As I scroll down the page, the videos will shift - the area circled in pink will shift to the area circled in red (and everything else shifts with it).
I have tried troubleshooting mode, but the same thing happens. I do not see this behavior on my old computer, and my new computer's Firefox profile is a copy of the old computer's profile. I also tried creating a new profile using Profile Manager, but the same thing happens. Both computers are Windows 10 with Firefox 93.0.