VLC for Mobile or MX Player . These will handle the Bengali audio encoding without lag. PC/Mac: VLC Media Player or IINA . 3. How to Open and Watch
Because .mkv files can be tricky for default phone players, use these for smooth playback: VLC for Mobile or MX Player
If the voices don't match the lips, use the "Audio Delay" feature in MX Player or VLC to shift the sound by milliseconds until it aligns. 4. Moving the File If you want to move this from your phone to a TV or Laptop: VLC for Mobile or MX Player