
Add video and audio in Keynote on iPhone
You can add video and audio to a slide or replace a media placeholder with a video. When you show the slide during a presentation, by default the video and audio plays when you tap anywhere on the slide. You can set video or audio looping, or set the start time to make the media files play automatically when the slide appears. You can also add a soundtrack that plays for the entire presentation.
Note: Video and audio files must be in a format that QuickTime supports on your device. If you can’t add or play a media file try using iMovie, QuickTime Player, or Compressor on a Mac to convert the file to a QuickTime file (with a .mov filename extension) for video, or an MPEG-4 file (with a .m4a filename extension) for audio.
You can also record video and audio and add it to your presentation.
To set video or audio looping, adjust the playback volume for audio, play video or audio continuously through slide transitions, or make other changes to your media, see Edit video and audio.