Alright, here's some tips to get you back on the right track when it comes to replays.
1) Always move with a purpose. Whether that purpose be style, power, positioning or something else you need, don't move just for the sake of moving. Your jump upwards was mostly useless except to get above uke. You could have used the downwards momentum to strike a more powerful blow. With that said...
2) Always try to be doing "something". When you jumped upwards in that replay, you were doing a whole lot of nothing while waiting to fall back down onto Uke.
3) Always look good when you can. If you can manage to fit something stylish in, do it. A pose is a good example of something you could have added.
Good luck!