mafergut
Legend
If you compare the scramble Feliks received which is in the video (will be made public when decision is made) to the cube he was supposed to, you can see there were 8 pieces different, aka one side minus the centre. This shows it was likely just one move. If you put tape, or otherwise kept track of all those 8 pieces, solved the cube and then slowly applied the scramble you can track when all 8 pieces are on one side. That's the point where the scramble was incorrectly done.
This is a common FMC technique where you can find premoves
Wow! You should be a teacher! You know how to explain things so that they're easily understood. I feel even dumber now