Just to make sure I'm understanding what I'm seeing, the plane gets hit at 1:03. The regular bursts of light from the start of the video to 1:01 are aircraft flares? Possibly parachute flares? At least some Russian aircraft apparently have parachute flares. At 0:23 you can see smaller flares being shot out to the side of the main flare. I think many aircraft flares fire in this sort of pattern because it makes the flares better mimic the shape of an airplane. Bonus points for looking really cool: