[v4.x] Video Rotator – Easily rotate or flip video clips in batch

I have some videos taken with old-fashioned digital cameras, and they turned out to be 'lying' when played in PC's media player. I made several attempts to seek some software with the similar function of rotating images in Windows Photo Viewer. But never found it. Fortunately, I finally came across this tool specially designed to rotate video - Video Rotator.