Please note that this issue is NOT resolved in iPadOS 15.1 Beta 2

I’ve found that there are delay issues when attempting to load an mp4 via an input tag, such as this: After selecting an mp4 file, the ’loadeddata’ and ‘loadedmetadata’ events do not occur immediately (which they should). It takes up to 5-10 seconds to fire the events. Perhaps this may shed some light on what’s happening; video.addEventListener('loadeddata', video_data); video.addEventListener('loadedmetadata', video_meta);