Consider the following scenario. In Microsoft PowerPoint 2010, you insert a video on a slide. The video uses one of the following video formats:
Then, you set the video to play automatically. On the Animations tab, you set the video to play across a set number of slides. In this scenario, when you show the presentation, the video does not start. Additionally, you receive the following error message:
The file you are attempting to play has an extension (.mov) that does not match the file format. Playing the file may result in unexpected behavior. Do you want the Player to try to play this content?
If you click Yes, the video does not play. Instead, a blank frame is displayed on the slide.
This problem occurs because Windows Media Player does not support the playing of QuickTime movies across multiple slides.
To work around this issue, you can convert these video files to the Windows Media Video file format (*.wmv) by using a third-party video file converter.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.