I put together a video test page here to look at: https://hallanalysis.com/video-test-page/ This same behavior happens on every page that a video is embedded.
And yes, all of my plugins are up to date.
Apparently the video checker only checks the first video on a playlist?? I had to go through all 12 with separate short codes to test each. It looks like there are issues with many of the videos… But there aren’t clear guides on how to fix… Do you have a list of recommended encodings, bit rates, and formats??