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.
Add video or audio
Go to the Keynote app
on your iPhone.Open a presentation, tap
in the toolbar, then tap 
.Tap Photo or Video; to insert media from iCloud or another service, tap “Insert from”.
Navigate to the file, then tap it.
To resize video, drag any blue dot, then tap Done.
Tap the Play button
on the media to play it.
Add a video from the web
You can add links from YouTube and Vimeo so videos play right in your presentation.
Important: This feature may not be available in all regions.
Go to the Keynote app
on your iPhone.Open a presentation, tap
in the toolbar, tap , then tap Web Video.Type or paste a link to the video, then tap Insert.
To play the web video in your presentation, tap the Play button
.Note: You must be connected to the internet to play a video from the web.
When you play your presentation, web videos play in front of overlapping objects on the slide.
Replace a media placeholder with a video
Go to the Keynote app
on your iPhone.Open a presentation with a media placeholder, then tap
in the bottom-right corner of the media placeholder.Tap an album.
To use a video from iCloud or another service, tap “Insert from” below the albums.
Tap the video you want to add.
If you’re inserting a video from iCloud or another service, tap folders to locate it.
Drag any blue dot to resize the video, then tap Done.
Tap the Play button
on the video to play it.
Replace video
Go to the Keynote app
on your iPhone.Open a presentation with video, then tap the video to select it.
Tap
in the toolbar, then tap Movie or Web Video.Tap Replace.
Do one of the following:
Take a new video: Tap Take Photo or Video below the albums, then tap Video. Tap
to start recording; tap 
to stop. Then tap Use Video.Select a file: Tap an album, or tap “Insert from” below the albums, then tap the video you want. Tap Select.
Replace a web video: Insert a link to a new video, then tap Replace.
Add a video description
You can add a description to any video in your presentation. Video descriptions are read by assistive technology (for example, VoiceOver) when someone uses that technology to access your presentation. Video descriptions aren’t visible anywhere in your presentation.
Go to the Keynote app
on your iPhone.Open the presentation with video, tap the video to select it, tap
in the toolbar, then tap Movie.Tap Description, then tap in the text box and enter your text.
If you export your presentation as a PDF, video descriptions are still readable by assistive technology. See Export to PowerPoint or another file format.
To add descriptions to an image, see Add an image description.
Add an audio description
You can add a description to any audio in your presentation. Audio descriptions are read by assistive technology when someone uses that technology to access your presentation. Audio descriptions aren’t visible anywhere in your presentation.
Go to the Keynote app
on your iPhone.Open a presentation with audio, tap the audio to select it, tap
, then tap Audio.Tap Description, then tap in the text box and enter your text.
If you export your presentation as a PDF, audio descriptions are still readable by assistive technology. See Export to PowerPoint or another file format.
To add descriptions to an image or video, see Add an image description or Add a video description.
Add a soundtrack
A soundtrack begins playing when the presentation starts. If there are slides that already have video or audio, the soundtrack also plays on those slides.
A file added as a soundtrack always plays from the start.
Go to the Keynote app
on your iPhone.Open a presentation, tap
at the top of your screen, tap Presentation Options, then tap Soundtrack.Tap Select Audio, then tap a song to add it.
To add more music, tap Add More Tracks.
Tap Loop to repeat the soundtrack until the presentation ends.
You may need to swipe up to see these options.
Tap Done to return to your presentation.
To turn off a soundtrack, tap Soundtrack, tap Select Audio, then tap Off.
Some media files are protected under copyright law. Some downloaded media may be played only on the device where the download occurred. DRM (digital rights management) protected music can’t be added to the presentation soundtrack.
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.