following up on this thread I made a few months ago: Play Button Not Working on Background Video in Low Power Mode - #4 by mikeyevin
When an iOS device is in low-power mode, it will not allow videos in Safari to autoplay without the user’s input. This impacts background videos, and Safari displays the play button icon.
the bug is that tapping the button does nothing, the video won’t play. I’ve resorted to using js code to detect the tap and then play the video.
this misunderstanding in the last thread is that the play button might be there as an indicator that there is a video, even if it’s not playable, but this is not the case. a round play button always indicates a playable video, and iOS has a different icon for when a video cannot be played.