Common mistake – you take a video with your mobile phone or digital camera, and you hold it horizontally.  Looks great until you take it home and open it up on your computer and you have to spend the entire video watching it with your head tilted 45 degrees.

How to fix this?  You’ll need Quicktime Pro for my solution ($30 from Apple) which provides the very handy ability to export Quicktime in heaps of different formats, and to rotate your source video too.

Step-by-Step:

Step 1 – First, open up your video with Quicktime Pro.

Step 2 – Once the video has loaded, you’ll need to click the Window menu item and select Show Movie Properties

Step 3 – Select the video track, then the Visual Settings option in the Movie Properties window

Step 4 - Click the Rotate button as required

Step 5 – Save your movie!

The above steps should now have allowed you to rotate your movie!  Hope that helps someone.