After playing a video, then main screen is shown again, and it is not clearly visible that via pressing "play" icon, you can replay the video again.
Other video players often have an icon which indicates that you can play again the same video. I would suggest implementing something like this in Dragon Player. Ideas: The last or first screen of the video is darkened (like when shutting down) and above this one can select between: Play last video again, put last video in a loop, select another file or stream. There could, additionally, be the option to show the last played videos and select one of them.