Dual Player
I’m learning English and wanted to watch movies in the original with my girlfriend. She isn’t learning English and didn’t want to watch in this way. I couldn’t find anything that really worked, so I vibe-coded this player. Now I listen to the original in my headphones and she listens to the dub on the speakers. This player runs in a browser and lets you play two audio tracks from the same movie on different devices. It doesn't require installation or an account and the movie doesn't leave your computer. https://dualplayer.app/