Greetings! No expert here, in fact I'm just starting out myself. So just a couple of general comments from me.
First, at 10 notes per beat at 40 & 45 bpm it's very difficult to tell if your timing is on. It might be better (and more practical from a musical stand point?) to do 5 notes per beat at 80 & 90 bpm for your videos instead.
Second, as you progress you're going to want your guitar in a more vertical position with the neck up almost by your ear. See the thread entitled "Check out Jorge Caballero" for one and also videos from the guys here. Might as well get used to it now. No sense "grooving your stroke" this way and then have to change up later on when you're trying to concentrate on something else. Get yourself a strap as Pebber Brown suggests in some of his videos. Trust him it helps a lot.
Cheers...................Todd