The built-in slideshow feature in the iOS Photos app is designed primarily for background music and does not natively play the embedded audio track of video clips during the playback.
How to Play Video Sound With Photos
The standard "Play as Slideshow" option mutes or overrides video audio in favor of background themes and music. Try these workarounds to get your video sound to play:
- Export as a Video: Instead of using the live slideshow player, add your photos and videos into a proper project or use a third-party video editor app (like iMovie or Clips) on your iPhone. Export the final creation as a single video file, which will seamlessly play both still images and your video clips with their original sound intact.
- Check Silent Mode and Volume: Make sure your physical or software silent mode is turned off and your side volume buttons are turned all the way up.
- Disable Autoplay Motion: Go to Settings > Apps > Photos (or just Settings > Photos depending on your exact iOS version) and toggle off Autoplay Motion or Autoplay Videos and Live Photos to prevent clips from defaulting to a muted state.