Thanks for the films, Tweety. Here are my thoughts.
The bad gunnery is more a lack of hamfisted flying when in close with enemies than it is about failing to aim. Are you using a twisty stick for your rudder? It seems that you get very rudder heavy when in close on an enemy, and this hard yawing back and forth keeps throwing off the shot. Try to stay steady and apply no rudder when firing at enemies for awhile. If you need to, even remove the rudder from your stick mapping for a night so you're forced to fly rudder free and pick an optimal shot that doesn't require any rudder input. Once you feel comfortable doing that, remap the rudder and begin using it for minor adjustments to aim rather than for major swings.
Also, try to range your shots and conserve ammo for the best possible shot. I know that's easier than it sounds, and it takes a lot of practice. The key here is to fire only when you think you're going to hit, and when you do fire just tap the trigger a couple of times to make sure you have ranged the shot correctly. If those shots hit, let him have it. What you don't want to do is hold down the trigger and kick the rudder around in the hopes that you'll hit the guy... that's terribly wasteful and inefficient.
Flying-wise, I think you rate your SA accurately. You do a good job of tracking a couple of guys through multiple views, but I did notice that your SA tends to break down when you have the enemy under your nose and out of sight for a couple of seconds. A number of times you pulled into a lead shot on a couple of planes, missed, and then failed to reacquire or figure out where the enemy went while he was out of sight. This didn't kill you or anything in the films, but it did rob you of some potential kills and allowed the enemies to stay afloat longer than they deserved. I think dueling with some folks in the Dueling Arena can seriously help you out here, since duels tend to turn into fights where you're pulling for shots and trying to keep your eyes on the other guy at all times. Duels should also help your aim in close.
Hope that helps!
-- Todd/Leviathn