You can insert the YouTube movies into your PowerPoint slides to express your idea or better way to communicate something. You can convey these ideas in more effective ways, if you are using movie files with your simple slides.

Follow the given steps to add YouTube movies into PowerPoint slides:

First of all download the YouTube.com movies and then save on your computer hard drive. Mostly movies are available in flash video file format on YouTube site. You can convert also the downloaded movies from YouTube into any common format, for example, windows media video file (wmv), windows video file (avi) and movie file (mpeg).

First of all open the presentation in which you want to insert movie file.

Now click on "Movies and Sounds" option from the Insert" menu and choose the option "Movie from File".
Here now you are asked "Do you want your movie to play automatically in the slide show? If not, it will play when you click it."

Recommend choosing Ok button to play automatically even if you want the movie to play when clicked.

Finally save your PowerPoint presentation and run it for test.