Oh man, that icon you used really tricked me into thinking I was about to watch a somewhat good action packed fight.
Instead I was faced with a stickman short. Dont get me wrong, I'm completely fine with the stickman fights, but they need some good action to back them up.
Even if you're a beginner like the animation here suggests you could instantly improve the submission with a simple drawn in background and some sound effects/copyright free music.
Other more complicated things I suggest working on would be some sort of dialogue, even if simple and thrown together, some length to the video so we have a solid minute of viewing, and continuation of improvement on the snoothness of the animation.
Keep on working.