Stop doing this. You need to shake off your analysis paralysis.
Knees coming in a very little at the bottom, certainly not as much as I recall from an earlier video. Stance might be a little too wide.
But this doesn't mean don't add weight. Working on form is an ongoing process. As you add weight, new imperfections emerge (or old ones return) no matter how close to perfect your form was at the lighter weight.
In every single squat video of yours I've seen, your form was good enough to add weight the very next workout. You should probably be up to 200 by now.
Next workout, add 5lb. Then the workout after add another 5lb. Don't stuff around perfecting form at 140lb for a week or two.
For the record, if you're eating enough, your body should be able to handle 10lb increases for a while yet, but given your reluctance to move up, I'm guessing 5lb will be easier for your mind to handle.