Great Job Buddy!
It's a new step for "B.Y. Productions"!
So, regarding the entire movie, it's fantastic, but I will argue.
At the beginning, their is a view of English Channel and a "record" on the soundtrack background, but we can't hear a word. Same thing for London views... I know my English is not perfect, but it's a point.
All plan regarding close Bf-109 are so impressive, for example, the right upper-wing, regarding heat effects.
For "fly-by" plan, it's the same thing as always, some ones are not necessary (like for He-111).
Then comes one of my favorite planes, Ladies and Gentlemans, the Hurricane!
After the take-off, the is a following camera looking great, and looking like first "Birds Of Prey" small definition game footage.
During the first 4:30mn, all is a little slow, it's should have been add with some scripting details, like for "Niobe". But after, all become faster, and sometimes maybe too fast.
According with some shots and effect, dogfight scenes have a weird cut, example with the Hurricane shooting down a He-111 at timecode 6:04mn, their is a explosion effect on the He-111, but the camera change angle after, back in a Hurricane cockpit. Why don't you have let some effect going their way? Maybe a 3-4secondes more on the He-111 had be great, looking for damages. Same for the next 30s.
Bullet effect look really good, but as philhl says, had been great if their is a shot, a pass-by and that effect.
And large plans look as old war footage, so great!
Saw that is not the official release, but more like a looooooooooooong trailer, so will wait for the full movie.
So sure, it's not perfect, but it's really a fantastic movie!
One of your biggest fan,
CONAN
PS: Hope you will make a movie about Battle Of Britain in the final release of Joe's English Channel map - and liked the end credits