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: If the video still won’t play, your fallback is to open the presentation in PowerPoint. If the video is a Windows Media or Flash video (.wmv or .flv file), you can play it after you install Silverlight (to play Windows Media) or Flash Player (to play Flash). You can play video and audio in Reading View and Slide Show View if you have Silverlight installed. You’ll need Flash for videos that are linked from a website. Keep an eye on the file size, because PowerPoint for the web won’t insert large media files. 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.