How To Rotate a Video 90 Degrees in Windows Movie Makerby Andrew David on June 15, 2012
If you have installed Windows Movie Maker (Windows 7 does not have installed it by default), than you can easily rotate a video with 90 degrees.
We assume you have Movie Maker (you can get it from our site).
1. Start the program and Add a video from your PC.
2. Click Rotate left with 90 degrees many times as you need.
If you want to save movie you can go to File menu like in image (save it on your hard disk, burn a DVD etc.)
As an alternative, if you do not have Windows Movie Maker, i recommend another free software that will make this operation - Free Video Flip and Rotate - you can view details and download it from this page.