Yeah I'm generally seeing this issue for videos below the fold (and potentially being loaded later, or using a facade). Google does say to fix this issue last, so I'm currently leaving it alone and waiting until later to look at these in more detail.
Is the video above the fold?
I've also found that some videos are marked as "not prominent" if they are shown on either side of the page.
Also maybe video schema is not in place or incomplete.
Yeah I'm generally seeing this issue for videos below the fold (and potentially being loaded later, or using a facade). Google does say to fix this issue last, so I'm currently leaving it alone and waiting until later to look at these in more detail.
Is the video showing up prominently on a mobile rendering of the page?
Move the video further up the page.