Nice to see the C2 get some love.
As another C2 pilot, I would suggest a couple of things: 1) Youre shooting from too far out, 2) you're not leading at all, and the guns need a LOT more than normal guns do.
I notice the plane is a very small shape in your gunsight when you open fire, and you don't land any hits. Then when you're pulling super-high deflection shots (almost 90 degrees on fast moving planes) your pipper is almost on top of the plane itself. You're missing by miles.
Note later when you actually pull enough lead (the plane disappears under the nose) the rounds hit and you get an instant kill? That's the normal amount of lead you need (most times).
Again that's mostly just in regards to flying the plane. The video was nice to watch. Music wasn't my cup of tea, muted it, but I wasn't bored with the rest.