How to rotate video

Use AVS Video Converter
download and install the program
1. open a file or files (it can work in a batch mode)
2. click the Edit button
3. click Add... > Transform > Rotate
4. set for example 90
5. close the edit window
6. select output format, for example DVD (AVS Video Converter has DVD burning engine)
7. click Convert Now

that's all

I think that AVS Video Converter is the best. It supports virtually all video formats and has built-in DVD, VCD burning engine.