The Discord website does not play embedded video files (mov, mp4, etc). This is an issue specific to Firefox, and is not present in other browsers such as Chrome. This issue is only for video files and not embeds from sites such as Youtube or Twitter/X. Furthermore, when downloading these videos, they play solely the audio and not the video part of it. This is not an issue with any other downloaded video. I have tried clearing my cache and restarting Firefox, as well as disabling my extensions. None of which has worked.