Stunning videos indeed. However, at that altitude had an unforeseen incident occurred the pilot would have had little or no time to react and The aircraft (weighing in at above 80.000 Kg - empty) would have done a lot of damage and could have killed a lot of people to boot.
There's no way that this type of flying would have been sanctioned at a UK based air show and there's absolutely no way permission would have been granted to fly over a crowd of people.
Thrilling for the crowd - totally irresponsible of the pilot - bet you he's ex military.
Si thee