With PowerPoint 2016, inserting YouTube videos into your class presentation is easier than ever! Here's how:
Open PowerPoint 2016.
Click the Insert tab on the main menu.
Click Video > Online Video.
Search for a YouTube video in the box provided, and select the one you want.
Click the "Insert" button when done. That's it! Run the slideshow, and click the video to play it.
Note: Not all YouTube videos have the copyright permissions to be embedded in a PowerPoint presentation. Some will give you an error message like this one when you try to play it. So, always test your presentation first!