By "twisty stick" I meant one where you twist the handle L/R to control the rudder. With those sticks some people have trouble because they accidentally apply some unintended rudder when they fly and shoot. They may think they're flying straight, but may actually be yawed a bit.
Your film worked fine. It was odd for me, no sound at all, and the prop didn't move, but that's ok. I'm not sure why that happened.
It did not look to me like you have a yaw issue, or wing leveling issue when you shoot. I'm not sure why your impact point is a bit left of center. The "low" aspect seems normal.
Have you by chance tried the guns, and really paid attention to where the impact point is? I wonder if that's also going to be off? I wonder if anyone else has this issue, and has noticed it? Maybe it's a bug?
If I get a chance I'll try it on my end too.