What is the easiest way to edit .MoV file?

You can still find windows movie maker out there. It's probably on softonic or cnet, although I don't think it will read a .mov file. But you can also find free video converters at those same websites like Free Video Joiner which easily converts about any file.

Short of that there are online services like rotatevideo.org not sure if it watermarks, compresses it to death, or will read .mov but from a simple search several sites came up.

ETA: You can also just do a free 30 day trial on Cyberlink Powerdirector (no credit card or any funny business). It's a very good editor that can do lots of other stuff. Only slight drawback is that trial version will have like a 5 sec watermark, but it's in the corner and goes away after the five seconds.

If that's a drag, the way around that would be to copy/paste your vid before you produce it in Cyberlink and then cut the pasted, unwatermarked half out in some freeware like Virtualdub.

Hope that helps.