I like that lower left perspective. That GoPro works well... You move your left foot back a lot, whenever you're not shifting.
Funny you should mention it: I put the camera there exactly to watch what my foot was doing.
In fact these videos are more for me to analyze my riding habits and figure out if I need improvement in some areas.
Moving my foot back is a habit I developed during the MSF class because one of the instructors said: if you are shifting, move your foot forward and use the shifter. If you are not shifting, put the ball of your foot on the foot peg and leave it there:
1 - you won't accidentally slide it and hit the gear shifter
2 - you give more room to the ground in case you need to lean hard
Or something along those lines.
Bottom line: it was hard to do at first, but once you get used to it you don't think about it.
If I have to shift my foot moves forward. If I don't have to shift, I put the ball of my foot on the foot peg.
Watch this guy: he does the same thing.
Between 1:15 and 1:25 (if you want to just skip ... although the whole video is pretty cool ... far cooler than mine).