In PowerPoint 2013, we recommend that you use .mp4 files encoded with H.264 video (a.k.a. MPEG-4 AVC) and AAC audio.
In Normal view, click the slide that you want the video to be in.
On the Insert tab, click the arrow under Video, and then click Video on My PC.
In the Insert Video box, click the video that you want, and then click Insert.
To help prevent broken links, we recommend copying the video into the same folder as your presentation, and then linking to it there.
In Normal view, click the slide where you want the link to the video to be in.
On the Insert tab, click the arrow under Video, and then click Video on my PC.
In the Insert Video box, click the file that you want to link to, click the down arrow next to the Insertbutton, and then click Link to File.
If there's already a video on a slide and you want to know where it's stored, go to File > Info. Under Optimize Media Compatibility, there will be information about all media files in the presentation—whether they are linked or embedded in the file. If there are any linked videos, PowerPoint gives you a View Linkshyperlink. Click it to open a dialog box that shows the storage location of any linked files.
If you want to insert a video on YouTube, switch to Insert or link to a video on YouTube.
When a video is selected on a slide, a toolbar appears below the video that has a play/pause button, a progress bar, incremental forward/backward buttons, a timer, and a volume control. Click the Play button at the left of that toolbar to preview the video.
By default, in Slide Show, the video plays when it is clicked. But if you prefer, you can make the video start automatically as soon as it appears on screen:
Select the video frame.
On the PowerPoint ribbon, on the Video Tools Playback tab, open the Start list and choose Automatically: