No collision.
There’s no Russian Collision!
Did they add audio from the editing studio?
It sure seems odd that the video scrambles right before the 'collision', then comes back after the 'collision'. What's up with that?
That prop blade didn't bend itself...
Go back and look at the last second or two of the video.
The pixelation caused by the contact clears and the video image of the rotating prop reappears. The tip of one of the prop blades is now clearly bent. Probably contacted one of the strakes on the rear fuselage of the Su-27 as the fighter pulled up.
Earlier imagery of the prop in the video show its blades to be straight and undamaged.
A damaged prop would introduce significant vibration and normally would require immediate landing of the aircraft. That was not an option given the location.
News reports indicate there was sufficient control and time for the drone to be flown to an area of deep water and deliberately crashed. Further, reports indicate controllers executed protocols to wipe classified systems of data/programs and probably “brick” (render inoperable/unresponsive) computer hard drives.
The impact of the crash did the rest. Assuming a high angle of impact at speed, the fragile nature of the drone, and the reported depth of the water, crash debris is probably pretty fragmented.
The fuel dumping maneuver as a possible intercept/knockdown tactic is interesting. Perhaps the pilot was hoping to create an aerosol effect and catch the drone on fire when the vapors contacted hot exhaust/components of the drone’s engine?
Take a look again at the prop.