In Normal view, click the slide that you want to embed a video as a background.
On the Insert tab, in the Media group, click the arrow under Video.
To insert a video from your computer or a file share, click Video on my PC.
In the Insert Video dialog box, locate and click the video that you want to embed, and then click Insert.
Note: To embed or link to a video from an online source, go to Embed or link to a video.
If necessary, click and drag a corner sizing handle of the video to size it to fit the entire background of the slide.
Add a video as the background for your slides
APPLIES TO: PowerPoint 2016, PowerPoint 2013, Less
APPLIES TO: PowerPoint 2016 , PowerPoint 2013 , More...