I don't know about belly heat, but he showed where he lived at the beginning of the video which is south Florida ( Ft. Lauderdale ) which would probably suggest that the temps and humidity are decent enough. The taller cage with the bigger normal was a screen cage.

I do agree that it looked like he kept things clean. I wouldn't worry too much as this video was posted in 2009. He does have recent activity on his account, but all of his more current videos are of quads and such. Chances are he probably doesn't even have them anymore.