Second round of that YTPMV tournament VS MrXarlable.
The video took approx 29 days to make when looking at the project files.
I tried to make something big for this, especially after seeing Aidan's notes about my previous round. Took quite a while to make! All in Vegas because I don't understand AE.
Extended version:    • Video  

Source is Nichijou (gud anime) and the song is Carrotus Castle (AKA 'Castle City') from the unreleased Jazz Jackrabbit 3 by Andrew Sega.