Hi Gus,
You need to get yourself broadband - there's such an amazing amount of stuff on youtube. It's great for that time of night when you aren't quite ready for bed, but aren't really up to doing anything that takes any effort.
You can rest easy where the alligator is concerned - the guy didn't really lose his head. This clip is actually a shortened version of another advert shown on British TV, for an Australian lager beer called Fosters. The people who posted it have taken the end off to pass it off as authentic. I'm pleased to say it is computer generated, though it does look real. People in this country weren't quite sure if it was faked or not, until the second ad in the series appeared - where a man got his head bit off by a pelican. If I can find that one on youtube I'll post it here.