I have seen pictures of this before, but not video. And yes, they are Harvards, or T-6 Texans. Harvard is the British designation for the North American T-6.
ok guys i will shed some light here... the first video is the southafrican aerobatic team flying T-6 texans... they first lock up the wheel breaks and then hydroplane on teh water...bush pilots do this when there is not really enough space to make a standard roll out... the last video is of an amphibous plane who was having gear problems... he decided to land on the water with his gear down rather land on cement with his gear up... he is so happy to survive it that at the end he actually gets out onto the float and happly paddles his plane.... enjoy all