In all honesty to me it looks like your seat is a little too low for your pedaling technique. Your ankle seems to be pretty rigid with toes pointing downwards most of the time so at the bottom of your stroke your leg doesn't extend as much as I think it should. Alternatively at the upper stroke your knee is bent more than I think it should be. Not to say your technique is improper, I'm just suggesting that because of it, your knees seem to be subjected to the same conditions as if your seat were too low which is usually a cause of knee stress/pain.

What length is your inseam and what length cranks do you have on the Verge? Also what is your usual pedaling cadence?