movies will not play on keynote slideshow exported movie

Thanks for posting in the Apple Support Communities GARY LAPIETRA,

Use the steps below to create a video of your keynote presentation:

1: Open the presentation, then click to select the first slide in the slide navigator.

2: Choose Play > Record Slideshow (from the Play menu at the top of your screen). The presenter display appears with recording controls visible at the bottom of your screen.

3: To customize the presenter display before you start recording, move the pointer, then click . For more details about modifying the display, see Customize the presenter display.

4: Click  to record your presentation.

The timer counts down from 3 before recording begins.

5: Do any of the following while recording the presentation:

* Go to the next slide or build: Press the Right Arrow key.

* Go back a slide or reset the builds on the slide: Press the Left Arrow key.

* Jump to a different slide: Press any number to make the slide navigator appear, enter the slide number, then press Return.

* Open or close a list of keyboard shortcuts: Press the Question Mark (?) key on your keyboard. You can use the shortcuts to control your presentation.

* Mute the microphone: Click  to stop recording voiceover narration. Click it again to resume recording narration.

6: To stop recording, click .

7: To preview the recording, click .

To play from a specific point, drag the playback slider at the bottom of your screen to where you want to start, then click .

5.To edit the recording, do one of the following:

* Rerecord from a specific location: Drag the playback slider at the bottom of your screen to where you want to start recording, then click . Choose Record in the pop-up menu to begin recording.

* Delete the entire recording: Click  in the bottom-right corner of your screen, then select Clear.

8.Press Esc to exit the presenter display.

The recording is saved with your presentation and can be played in Keynote. To export a recorded presentation as a video or another file format, see Export to PowerPoint or another file format.

To remove a recording from your Keynote presentation, choose Play > Clear Recording, then select Clear in the pop-up menu.

Record Keynote presentations on Mac

If the issue persists or you need more help, providing a bit more information and context can increase the chance you'll get a helpful response from the community.

For example, what type of video is being used? What's the source of the video? What are you seeing instead of the video in your recording?

Cheers!