No it is not vague. The man takes 70 seconds to explain the difficulty of the ballistics match of the projectiles.
Yes it is vague. If it wasn't you would have a slam dunk case. Speculation never proved anything.
I'm not going list all the points he made. You need to rebut Joseph D. Nichols conclusions point-by-point: Otherwise you're just another contrarian.
Well, this is your propaganda so you need to make your case. The reason you refuse is because you have flimsy evidence.
Incidentally, your brief, incorrect statement is actually "vague" too. What irony!
If you had solid evidence then you would have a case. Nothing you've shown proves anything about Oswald.
The Video concludes with text stating: "Joseph D. Nicol's expert ballistics evidence SUPPORTS other evidence that Lee Harvey Oswald murdered Office J.D. Tippit".

That isn't proof of anything.