E.M. Free Powerpoint Video Converter is another freeware powerpoint to video converter that you can download and install on your PC. This free PPT to video converter is a stripped down version of the more feature rich commercial Powerpoint Video Converter. This is only free PPT to video converter that I found that supports converting PPT to HD video formats as well. It has a really wide variety of output video formats that it supports. However, it adds watermark to some of the formats.
Output formats without watermark: WMV, Ms Mpeg4 AVI, MPEG, MP3, BMP