Actually finding videos was harder, because that's not the view we usually get to see. I was looking for a particular one but can't find it.
Horowitz we only see in the beginning. His left foot goes to different places. How do we stay balanced on the tripod which is our seat and two feet while also doing delicate things with the pedal?
This camera has a static view so we can see feet throughout. Mostly his feet are over the pedal because pedal is so frequent. At 12:49 when the other pianist has a long solo passage, his feet go to the floor.
Mozart - more like the kind of music you're playing - pedal continually used for subtle shading, so foot stays over the pedal.
I don't know if this gives any insights or feel.