Microsoft PowerPoint Inserting a YouTube Video (PC)
To insert a YouTube video into a PowerPoint presentation you must first download that video to your computer.
Download YouTube Videos to Your Computer
To download a YouTube video to your computer, navigate to the YouTube video that you wish to insert and in new tab or window go to: http://en.savefrom.net/
Copy the YouTubes URL and paste the URL into the box on http://en.savefrom.net/, then click the download button.
Putting A Video Into Microsoft PowerPoint