The video says this happens for the duration of the summer, every year. That seems pretty frequent to me.

It does not happen “for the duration of the summer”, it is usually only for a few weeks and in a few locations (which, coincidentally, have a high percentage of Middle Eastern expats.). You do not see Ferraris cruising through Shoreditch and with the exception of one douche who drives a gold Lambo down my road every weekend as he heads off somewhere to show it off I have never seen one of these cars actually being driven. Parked near Harrods or Green Park begging for attention, yes. Driving around? No.

Frequent in that neighborhood, but still very rare in the grand scheme of things. You're missing the forest for the trees.