Hasta La Motion!

I’m new here on this forum and I’ll give myself a kickstart by asking something I could learn of :p I just watched this video: http://www.youtube.com/watch?v=94KO4…ature=youtu.be , now i was wondering, at 0:33, how did he delete the dog from the scene? Did he export the sequence in png or jpeg format and stamp-tooled the dog in every single frame away in photoshop? Or is there something else he could have done?

I’m sorry if this is a stupid question or one that has been asked a billion times. (I tried the search page but didn’t found any matches)

Thanks in advance!