As far as I can remember, he doesn't have too many videos of his own, but he appears on other channels too.
In this video, he shows a couple of great exercises.
My (partial) routine is:
Tibialis raise - 3 sets of 25 reps.
Body weight squats with the knees going past my toes, to a point where I am on my tiptoes when I'm the lowest - 3 sets of 12 reps.
The lunges he showed in the video - 3 sets of 7 reps per leg.
I should mention I was working out for years (and still do), both in a gym and outside, and I was under the false impression that your knees should never go past your toes while doing leg exercises. Every trainer, every YouTuber, everyone I learned from taught me it's bad for the knees. Well, I guess this is not the case, and my past training did strengthen my legs, but weakened my knees.
I treat this leg routine as physiotherapy more than anything, but to my surprise it also helped get my legs stronger, more muscular, and leaner. Just make sure to do these exercises very slowly to avoid injury, and if you need -- support yourself by using a table or a chair to push yourself up with your hands. As you get more comfortable with the exercises you can add more reps, start doing them without support, etc. Just listen to your body and stop if it tells you to. If you need to start with one rep, then do it. It's going to take some time for the body to adjust if you have never done these exercises before.