You look awesome and doing a great job.

My sister in law had very painful knees/arthritis and foot pain, when she gained weight to about 165 lbs. She's 5'5". When she lost weight to about 135, she found the pain was mostly gone. Here's to hoping your knees will recover, and maybe in the mean time try not to overdo it when they do hurt. I alternate my exercises so as not to get a repetition injury.