Play video clips in Photos on Mac
You can play video clips you’ve imported into your Photos library, and even adjust their look, apply a filter, crop them, and more. You can also display and change slow-motion and time-lapse video clips imported from an iPhone.
In the Photos app on your Mac, double-click the video clip to open it.
When you hold the pointer over a video, the video controls appear.
Click the Play button .
You can use the video controls to pause the video clip, fine-tune the sound, and more. You can also press Option-Space bar to start or stop playback.