If u have problem whit video type use SUPER convertor and convert yor files to any suported format. (FLV, MP4, MP3, AAC, JPG, PNG and GIF)
suported files and all information about JW player is here -> https://www.longtailvideo.com/players/jw-flv-player/
SUPER convertor homepage -> https://www.erightsoft.com/SUPER.html
