I have an MacBookPro with Windows installed via BootCamp. I copied a video off the iPhone and saved it on the windows partition. The thumbnail of the video looks upside down. When I play it in Windows Media Player or VLC, the video looks upside down. When I play it in the QuickTime player (still on Windows), it looks right side up.
I then boot into MacOS. The thumbnail looks right side up and when I play it it looks right side up.
So what is going on - which app/os is telling me the truth? I want to make sure because I want to upload it to youTube and the file is huge, so don't feel like wasting time/bandwidth.
P.S. EDIT: Just like a couple of folks pointed out - some programs are ignoring the orientation tag. I tried it on Windows 8 and all programs seem to respect the tag (including Windows Media Player and Movie Maker and Video applet in Metro screen). So good progress.