Support Home Page › Forums › Joomla Software › Easy File Uploader Module › Upload File .flv › Re: Upload File .flv September 24, 2015 at 1:28 am #2164 Michael GilkesKeymaster @burlamhack. All you have to do is add the mime type for flv files. Just do a google search for it. It might be “video/x-flv” and/or “video/mp4”. Of course, this depends entirely on the mime your server detects.