Get PPTmovie, a conversion software that turns PowerPoint slides into movie formats like MP4, MPEG or AVI. The software will also record any background music or audio narrations through the microphone and sync it with the video slideshow.
The tool costs around $50 but you can have it absolutely free today courtesy GiveAway website. [The free download link expires at 11:59 PM PST]
Download PPT Movie at GiveAway of the Day.
While PPT Movie will help you burn those PPT slideshows on a DVD disc or publish them on the video sharing websites that accept AVI, you may consider SlideShare for embedding Powerpoint slides as Flash in webpages.
Related: Convert PPT to AVI or MPEG with VideoScout