I flew Aeroflot on the 14th of march (just checked) SU231 - A320 MOW-BRU and pretty much the same thing happened.
I was near the wing and could very clearly see a layer of snow (not quite as thick as in this video but considerable regardless) on the wing that was swept off as we gathered speed during the take-off roll.
So to say this is an isolated case...don't think so. And I don't recall that we were in any kind of hurry to go. Plane was at the gate when I got there more than an hour before the flight and we boarded on time and landed 10 mins ahead of schedule (although there was a bit of a queue for TO with 1 RWY out of service due to snow crews working on it)