It can include other types of videos to be uploaded
Hi, belaadel! Thank you for your rating :)
Unfortunately accepting other video formats would mean more stuff for your server to do, as only MP4 is accepted by all nowadays' browsers (desktop and mobile) natively (just like MP3 format on the official audio plugin). And it would only be possible on dedicated hosting, as doing that on shared hosting might mean having the account banned for high server resource usage...