OK, am I just tardy to the party on this one? I just now stumbled upon Dailymotion where they have great animated expansion vids....for some reaosn though, I feel like I've seen posts about dailymotion on here?
http://www.dailymotion.com/video/xhuha7_pregnant-belly-and-breast-expansion-2_sexy
Dailymotion has had a decent amount of inflation related content for a few years now. The rules are much more lax (compared to youtube) and it is harder to get your vids removed by haters.