Video at
this link shows the gear coming down earlier in the sequence, so presumably there was a problem there as well and he retracted then lowered it again. Neither leg appears to have locked down as in Nutty's link the left leg seems to swing inboard slightly just before touch down.
Great work Sir and so very glad you are in one piece.
This video shows what can happen when a Sea Fury lands with one unsafe...
https://www.youtube.com/watch?v=jEs5xKXgm6w