I found the video!!
It was a program called "Secret History - The Dambusters Raid" And shown on the BBC. It also had interviews with some of the Survirving 617
Squadron Crew members.
The aircraft the Americans tried it with was an A26 invader, The bomb hit the wave bounced up, and smashed the whole tail unit off - the rest of the aircraft broke up when it hit the sea.
Interestingly enough, The German Plans drawn up on the bomb that didnt explode were complete 10 days after the dams raid!! They tried experiments with a very small bomb roughly three maybe four times the size of a football code named "Kurt" and instead of putting backspin on it like the british ones, they used a small rocket propulsion unit that broke off after the bomb hit the water for the first time.
The video showed an FW190 doing a test drop. - it was wildly inaccurate, the bomb sailed over the little boat and kept on going for some time!!
Its been over a year since i watched it, Glad my memory held true!