It`s definitely not the Bubnov`s scene! He didn`t even work on the first episode of "Treasure Island", from where this clip was taken.

wazamekid said:
It`s definitely not the Bubnov`s scene! He didn`t even work on the first episode of "Treasure Island", from where this clip was taken.

Yes, I don't think it's Bubnov's work, judging by his other sequences, it looks more like Alexander Lavrov's (?) to me. But speaking of credits, the credits shown on animator.ru for the first and second part of this film don't match the actual end credits of either film. So I don't know what's going on there.