The Bell P-39 Airacobra is an interesting aircraft. It was the most successful combat design produced by Bell Aircraft, but it didn't rack up its kill count with American pilots. The Airacobra was perfect for Soviet use for all the same reasons that it was mostly rejected in Western European air doctrine. A fast aircraft that turns well and carries a modestly heavy armament is desirable on the Eastern front even if it can't climb to and perform at higher altitudes. As a result the Airacobra flies with similarity to the Russian light fighters around her and can benefit from the same tricks, pilot skills and equipment loadouts as the other tier V to VI Russian fighters.
Of particular note is her main cannon; a 37mm monster mounted in her hub; it does *massive* damage but fires slowly, overheats quickly, and isn't the most accurate thing in the world. Get up close and personal to get the best use out of her. Her pair of 50cals are accurate and do decent damage but can't be the source of all your damage in a tier VI match; learning to hit with the cannon on deflection and chasing shots does improve your chances with the Airacobra.
All this being said; the aircraft obviously isn't strong against the high alt meta, but occasions like the DRACS post-clanwars scrims give the aircraft a chance to shine in an environment artificially crafted to turn her loose in. Which is exactly what the battle shown is. The first fight's a little rough. That low framerate isn't just from capture and production; I was actually dealing with framerates close to this low during the battle. Needless to say it made landing hits or being evasive somewhat problematic. Thankfully that problem sorted itself out by the beginning of the second scrimmage match with same teams and same rules of engagement.