Title: Making videos play successfully in PowerPoint for the web - PowerPoint
Headings: Making videos play successfully in PowerPoint for the web
Making videos play successfully in PowerPoint for the web
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Videos that are inserted with a desktop version of PowerPoint
Unsupported video format in PowerPoint for the web

Content: For embedded media, the size limit can be from 50-100MB, and for WAV files the limit is 100KB. If you use a desktop computer running Windows 8, run Internet Explorer from the desktop (rather than in immersive mode) to use Silverlight or Flash Player. Also, these players can’t be installed on tablets or touch-screen mobile devices; try opening the presentation in the desktop version of PowerPoint to play the video. Videos that are inserted with a desktop version of PowerPoint
When you add a video to your presentation in a desktop version of PowerPoint, make it easy for people to play in PowerPoint for the web. Embed an MP4 file, and then go to File > Optimize Media Compatibility. This command puts your video in a format that plays directly in browsers that support HTML5. Unsupported video format in PowerPoint for the web
PowerPoint for the web doesn't play Shockwave Flash (.swf) files. To work around this limitation, convert the file to an .mp4 file encoded with H.264 video (a.k.a. MPEG-4 AVC) and AAC audio.