How to rotate a video
You can rotate videos 90 degrees in Virtualdub.
To convert an mpg file into avi format for Virtualdub, you can use RAD video tools.
Both programs are free.
Take a screen shot of a wmv movie file
When I’ve tried to take a screen shot in Windows Media Player of a wmv file, I’ve found that the program gets snapped, but not the movie itself. You can take a screen shot from a wmv file by importing it into Windows Movie Maker. Just slide the preview screen to the part of the movie you want to grab, and press print screen. You can then paste the screen shot in a paint program and crop it to show only the video.
Get Youtube videos to play in Powerpoint
Here is a video I made to show how to download and convert Youtube videos so they will play in Powerpoint:
Get Firefox to download wmv files
Here is a video I made that shows how you can get Firefox to download a wmv file rather than just play it online: