How can I upload a powerpoint file on twitter?

[Rayman will]

I usually upload my PowerPoint as videos to twitter.

Method A:(For all PowerPoint versions)
1.Save your PowerPoint slides as images like JPG or PNG in Mirosoft PowerPoint
2.Import these pictures into Windows Movie Maker and make a video.

Method B:(For all PowerPoint versions)
Use a PowerPoint to video converter like
Moyea PPT to Video Converter http://www.dvd-ppt-slideshow.com/ppt-to-video/
to convert your powerpoint file to video format directly.

Method C: (for PowerPoint 2010 user):
If you are using PowerPoint 2010, you can use the newly added function to directly save PowerPoint as WMV (only) format