I don't know much about this bug in particular, but if one uses the pdfpc-commands package and embeds a video file using it (see https://github.com/pdfpc/pdfpc/releases/latest/download/pdfpc-video-example.zip), and uses XeLaTeX to compile the tex, then pdfpc won't show the video (but will play audio). This is because, and I quote from someone else:
The resulting PDF reports that the action mapping should be drawn in a zero pixel square. pdfpc attempts to comply and of course fails, because you can't render a video in a zero pixel square. Acrobat Reader even displays an error message if trying to view the page with the embedded video - if I instead open the presentation as created by pdflatex in Acrobat, I see the overlay image and a hyperlink, as expected.
This does not occur with either pdflatex or lualatex. For more information, see https://github.com/pdfpc/pdfpc/issues/224
Anonymous