BUG - Adobe Acrobat Reader stops Windows Media Player from playing MP4 files opened from the PDF attachment pane
When opening an attached MP4 file from the attachment pane in Adobe Acrobat Reader version 2022.003.20322 64bit, the media file will begin to play within Media Player but will then stop due to an error indicating that the player could not access local storage. I believe this is because the reader is locking the file as some point after it has begun playing. This does not happen with other PDF readers that support attachments.
Ken Layton shared this idea