To add a video to your presentation, go to the Insert tab and click Video. You can add video from your computer, or use the embed code to insert an online video.
Once your video is inserted, you can resize and format it by right-clicking it and then clicking Format video.
Once your presentation is complete, launch it by clicking Slide Show Start in the lower-right corner of the PowerPoint window (pressing F5 will also launch the slide show).
There you go. That’s pretty much all there is to it. You're now well on your way to mastering the art of the presentation. We predict success, whoever your audience may be. For more info on building your PowerPoint skills, check out this article.