To play recorded videos on your HD TV unit,
1. make sure the TV USB port can play movie file (some brands can only play photos and music file).
2. the recorded video files are unpressed AVI format, you may utilize Windows Movie Maker to save selected videos as WMV format movie file.
3. After movie file is created, then save to a flash drive. You will be able to play the videos to your HD TV.

The TV output on car DVR, can only play analog signal via a RCA cable, you will not able to play a full HD video.