DubFlow dubs any YouTube video into your language while it plays, inside the player itself. It reads the video's captions, translates them, and speaks them with a natural AI voice timed to the picture. The original audio drops to about five percent underneath, so music and room tone stay. Nine languages, female and male preset voices, no voice cloning, optional floating translated subtitles. Free plan: three videos a day, up to three hours each, no card needed.