Yeah imovie has a heap of movie trailer templates that you can choose from and just drag and drop movies and pictures into. Then you just fill in the text in a very easy to use thing and it does the rest..
I'll try and put some video in on one day.. also very easy to edit.. came with my MacBook pro.. dunno if it is native or comes with ilife..
Glad you enjoyed watching! I stuffed one bit up where it repeats s few pics but got lazy(er)
I'm not sure cause I don't have a PC but I wouldn't have thought so. You can install Mac on a PC though but probably defeats the purpose
It came on both my MacBook pro and iMac so its probably pretty common.