I just started learning Final Cut Pro X this week, and figuring out how to get things onto the web in the correct aspect ratio, etc. I recreated a montage that I had cut several years ago on an early version of iMovie, but this time not working from a DV tape copy that was interlaced. The material was 480P but I copied it as 720P ProPres files, mainly because eventually I'll have to mix in some movies that I can get at 1080P so I plan on doing all my reel montages in 720P as the common resolution.
Using Compressor, I got rid of the letterboxing so that the QT was 2.35 (child's play for most of you, but this is all new to me...). For now, I'm using Vimeo to host the edits as I create them. I'll probably first finish recreating the old montages that I done years ago, just so that material is now on the web, and then tackle a new montage. That's a bit daunting after 35 features, some pilots, and 3 TV series... there are many hours of material to cut into something around 2 or 3 minutes, and the projects vary wildly in tone. I may just stick with a couple of montages rather than one, who knows.
I put the link on my website:
http://www.davidmullenasc.com/styled-20/index.html
Or you can jump directly to it here: