Shown first sometime in the noughties, these are definitely a spawn of the nineties BBC2 idents. They do the job perfectly. They look cool due to the hidden '4' in the location and keep you engaged as the program is introduced. It is the hidden '4' that makes these so different to the BBC2 idents; the fact that they are very stringently location based. Whereas The BBC2 idents focussed more on materials and objects.
Where is the sense in a boring ident? The amusingness of the ident is just as important as the relevance to the channel that they are being shown on.
Be seeing you!