Hey, these replays are quite nice for somebody who just got into replay making.
But i guess you'd be more interested in some constructive comments rather than a boring "that's nice!", so i'll give it a try even tho i suck at this :S
First of all you're a bit twitchy at some moments in your replays, secondly you keep your arms and knees fully extended or contracted a bit too much, try to use more relax and hold instead of contracting and extending joints to make your moves more smooth and fluent. Try not to overuse relax as well tho, most replay makers do that mistake when they're just starting to make replays.
Other than that i guess everything else comes mostly with practice so keep making replays, etc etc :o