If you want Dolphin to automatically start with a fresh save each time you play back the movie, make sure you have no save file for the game when you first start recording the movie. This sets a special flag inside the DTM file.
It is possible to edit this flag after the fact using a hex editor, but if you're getting desyncs when you manually delete your save before playing the movie, you'll get desyncs with this as well. You'll most likely need to redo your TAS.
It is possible to edit this flag after the fact using a hex editor, but if you're getting desyncs when you manually delete your save before playing the movie, you'll get desyncs with this as well. You'll most likely need to redo your TAS.