What file format are you using? I had this problem with .flv files and sorted it out by converting them to .mp4.
Lesson
Video player appears duplicated on answer screen
تم تأمين هذه المناقشة لذلك لم يعد بإمكانك الرد عليها.
What file format are you using? I had this problem with .flv files and sorted it out by converting them to .mp4.