Here's the World 1 of Super Mario Vacation. I didn't get all of the secrets and such as I played through it, just because I wanted at least some things to be left to be discovered.
Fraps didn't want to work with SMBX, and every other screen capture program I tried refused to record sound, so I just used my digital camcorder to record the gameplay. I didn't turn my speakers up too much either, so viewers may need to turn up their volume.
I need to lengthen World 1 a little bit since I blowed through it pretty quickly. Still, I recall Yoshi Island in SMW being able to be cleared in about the same length of time, so I may not need to lengthen anything too much.