What parts of a presentation will not be included in a video?

The following items will not be included in a video that you create using PowerPoint:

Media inserted in previous versions of PowerPoint. To include these, you can convert or upgrade the media object.

Tip For example, if you inserted the media using PowerPoint 2007, it will be linked and it will play in the presentation. However, when you export the file as a video, the linked media will be dropped. You can convert the file to the new file format (click the File tab, and under Info, click Convert) - or you can right click the media object, and then click to upgrade, it will embed the file and export it correctly.

QuickTime media (unless you have a 3rd-party QuickTime code ffdShow, installed) and you must optimize for compatibility

Macros

OLE/ActiveX controls