Okay, in the first video I noticed that you do not have much of a release on your horse. You want to give with your hands more over the fence. I'm not sure if he's a very strong horse where a crest release would be too much but definatly give him more of a release over the fences. Every once in a while it looks like you are leaning back a bit with your upper body, remember to keep a nice, straight line of shoulder, hip and heel.
Second video, now I see why you are trying to not release that much. He looks strong to the fences. Remember, you can hold him to the fence, release, and then bring him back to a hold. I like the look of your leg, shorten your stirrups another hole or two when jumping though and I think it'll look even better. Your horse is handsome! I had a horse who was very "hot" to the fences. I wound up doing some basic dressage work, teaching him to collect, give to the bit, teaching him to respond to half-halts, and he improved immensly over fences, so if you can I would definatly do that with him. You'll be amazed how once he understands what a half-halt is how you'll be soooo much more in control when jumping.
Honestly, I think if you just give more of a release over the fence you'll look a lot better. =) Good luck this Sunday!! Let us know how you do. What division are you showing in?