To be honest, those are probably some of the best looking squats that have ever been posted here. Quite literally textbook, from what I can see. You may have a meniscus issue, such as a partial tear or fraying, which lots of folks get as they inhabit our imperfectly constructed bodies. Squatting might bother that. I would consider getting a diagnosis since I am really just some jackass on the Internet. If I turn out to be right, lemme know so I can continue to inflate my resume as a Remote Healer and Psychic™. It is possible to drive your knees out too much in the squat. A video from behind would show that more clearly. If your adductor is not hurting, I would not worry too much about it. There is very little chance that some scar tissue in your adductor would cause your knee to pop, although knee pain can be exacerbated by soft tissue issues above and below. If I had to guess, I would say your previous adductor injury has little to do with your current knee pain.