The RPM of most large propeller aircraft is about 2,500 - around 40 rotations per second.
Can a spy camera really generate a flawlessly focused stop action photo at 40 frames per second?
Yes, CCD video cameras work at a framerate of 60 frames per second, and are shutter based so that the actual exposure time (which depends on the available light) will only expose the CCD pickup element for a fraction of that 1/60 second frame.
If you look at the video, it appears that the propeller is moving very slowly, when in fact it is moving very quickly and is just being captured in a "stroboscopic-like" effect.
In film, it's often called the "wagon wheel effect" because in the 1950s Westerns, the frame rate of the camera and the rotation of wagon wheels made it appear that the wagon spokes were rotating backwards, when in fact the were not.
Here's the full collision vide from Rumble. You will see the bent propeller only in the last few frames before the video ends, so keep watching when the color bars pop up. The image returns.
https://rumble.com/v2ddhbg-video-of-russian-su-27-fighter-jet-colliding-with-mq-9-drone.html
An iPhone has been able to do 100 hz for a long time now. An iPhone could absolutely capture that frame by frame in slow motion mode.