Board Thread:Script Suggestions/@comment-38310889-20190729070309/@comment-27345308-20190729172913

You can't upload videos from your device, you can only embed them from other services like YouTube using the page I linked above. I'm not sure why can't you upload GIFs, though (uploading GIFs through Special:Upload on mobile works for me), other than possibly the GIF files not appearing in the picker (but that isn't an issue on Fandom's side).

Anyways, this CSS rule by Noreplyz for making the modal windows fit the screen on mobile seems to be kind of working for me: Place it on a  page on the wiki where you need it and add   or   at the end of the URL to your current page to make sure the CSS takes effect immediately instead of waiting for cache to clear.