This video is from a Bulgarian FB page, but it probably was filmed in Russia. Amongst the cars there is a Russian Lada Classic (“Жигули”). The helicopters seem to be Mil Mi-24 Hind or Mi-28 Havoc, the latter are used by Russian aerobatic performance demonstrator team Berkuts, which machines may be equipped with smoke generators (I found no pictures or videos of their use yet). This could be their flypast over a town with a smoke salute.
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