Okay so the exporting to WMV and AVI was disastrous. Somehow an 11MB file of a 26 minute video takes 45 minutes to export and becomes 60MB for WMV and 110MB for AVI.
Anyway, I thought I'd mention that it's really not that frustrating most of the time. It's actually quite funny to play. I laughed while playing all the times I would have laughed while watching. It's really hilarious to see the funny ways the level designer has tricked the player into certain doom.
But I did get stuck on world 1-3 for over ten minutes near the very beginning of the level which started to get frustrating. I finally figured out the key to get past where I was when I had to quit playing.
EDIT: Here's a small video of the transition from world 1-1 to 1-2.