I'm afraid your first point is not possible. The dimensions of a wheel in a rim package, including the width, is based on the original car's wheelsize (the COL).
Same goes for point 3. You need to edit the vehicle for the wheel to be bigger.
@TR71777@car-mod-fan Is a good idea but bad for the performance. Unfortunatelly, Gang Wars, War mods and other with high number of peds in scene with combat behavior active, can greatly decrease game performance.
However, a talented modder is working in one looking the best performance and realism possible in his mod War V
For a historical environment, just needs skin mods in peds, vehicles and weapons edited.
I have a feature similar to that in the Captain America script; here's the code as its own little script: https://pastebin.com/EWkW7A0P
Create a text file, change the extension from .txt to .cs, and paste the code inside (the filename itself can be whatever you want).
It isn't exactly as in the video though. You must tap Jump or Sprint before you touch the ground; it works best if your feet is closer to the ground than your head is
Edit: Forgot to mention, it's a .NET script, so the .cs file must be in the scripts folder.