Some of those reps didn't look too bad to me, some were a bit rushed though. Maybe try settling into a dead hang at the bottom of each rep and count to one ie. say to yourself and one, and then do your next rep. It's OK to do a bit of strength work where you don't pause at the top but the bulk of your work should be more controlled with a definite pause at the top.
Are you doing any triceps extension work ?
If you neglect that and just focus on pullups there's a good chance you'll hurt your elbows when you are learning the transition from the pullup to the press out on the muscle up.
A low bar (around chest height) can be really helpful there, you can do dips and negative muscle ups to help build the strength you need for a full muscle up later on.