if you have time to look at Utube ............. you probably have time to read / scan some comments. Who knows if the poster was an instructor (at face value they are)
............... there could be 'some' truth to the technique ........... that's why I posted it ................ something good might come out of it - or perhaps it can be dispelled
(a trimmed aeroplane is easy to fly with just you feet - you can lean back and relax - try it - I am not qualified to make this statement, do not try this at home)
I agree with Skippyd about 3 posts above ............ no need to be doing barrell rolls with the yoke
not being an instructor nor a brain surgeon; but: ................ it could be a nuerological thing - your hands are to close to your brain
your feet are further away so they interpret logic better - maybe using the middle ear as a movement sensor