Once you've added a video to your presentation, add basic effects and choose how the video is played.
Choose how your video is played
Select the video you want to format.
Click the Video Format tab on the ribbon.
Click the Start button on the video tab to choose if you want your video to play Automatically when you get to the slide in your presentation, or if you want the video to play When Clicked.
Add video effects
If you want to give your video some extra style or formatting, you can do so with Video Effects.
On the Video Format tab, click Video Effects.
You can choose any number of effects to give your video more emphasis—Shadow, Reflection, Glow, Soft Edges, Bevel, or 3-D Rotation.
Can you trim a video in PowerPoint 2016 for Mac?
You can't trim a video from within PowerPoint 2016 for Mac. If this is a feature you'd like to see added, please leave us your feedback at the PowerPoint for Mac User Voice Forum.