After looking at the official rules I have found this for Zoo tycoon Machinima people: http://zoo-tycoon-fanfiction.wikia.com/wiki/Special:WikiActivity
Another is made by Werepizzapiepengohamsterguy: http://zt2machinimias.wikia.com/wiki/ZT2Machinimias_Wiki
Add your youtube stories to these two wikis :)