Your Leccion #1 is really great. I especially like the movement of your right thumb. Looks very deliberate with the recoil and damping!
You seem to be doing everything very well. I think the only thing you would need to make you Leccion 1 performance perfect is a little more time to iron out those few minor mistakes. If you are like me, I'm sure you couldn't wait to complete this lesson and post your video. But I believe if you spent maybe one or 2 more practice days on it it would be *perfect*. Of course, these are just exercises and the videos don't need to be perfect. But just so you know, perfection is very much within your reach!
As for the other videos, those are very good as well. Your right hand looks and sounds good. One thing you might try is to keep your left hand fingers closer to the fingerboard (ready to play). In the 2nd alternation exercise you show some tendency to lift your fingers far away from the fret board. You might try training them to just lift slightly (about 1cm) off the string. This will do a lot to help you improve both accuracy and speed when it is time to return these fingers to the frets.
But again, overall fantastic work here!