Cheese and Crackers have links to a dozen or so videos of the tsunami. If you have broadband you should check them out by downloading and playing them.
I recommend the first one Thailand) which shows a resort being hit. The fourth (also Thailand) is very short but shows the power as it comes up from a beach.
The Penang one is very sad as you people and kids watching from the beach until it is too late.
The Wizbang recommended one shows it from a beach as people reverse off still filming.