The issue with watching C players, or even many B players, is that the shots you see them shoot can be a lot of times the wrong shot selection or at least shot with the wrong speed, spin or english. So basically you are looking for people that make the same mistakes as you, not on how to play the shot the best way. Why watch people make the same mistakes as you? You can just record yourself LOL
Didn't efren say he learned a lot by watching low level players ?