BigJet TV might be amusing for the uninformed but it’s just fluff TV to those with a real operating perspective into LHR or anywhere else. The only windy bit was the diatribe from the yahoo occupying the audio feed.
I think left rudder was applied to miss the object in the water. The theory of interacting waves (similar to a speedboat doing tight circles on a lake) just doesn’t “hold water” in my opinion. Sorry couldn’t resist ?
The explanation appears logical. In the longer video Seeker posted (accident begins at :40 secs) after the object is hit and raises the hull, there is a splash behind the aircraft as the object resurfaces.