Here is the newest video! A bit of a fantasy setting, but a realistic depiction of forces involved, I'd say.
USA vs Russia: Arena war
Also, I am glad you liked the video about missiles. Of course, much in the videos is simplified and some stuff is omitted.
Britain will have a better SAM defense once its CAMM family of missiles is online. While not of long range, important addition will be the fairly high ceiling of the system, enough for creating a barrier through with enemy planes will have to fly.
Edit: For the paramilitary in the newest video I included various border guard forces as well as the former Internal troops (now National guard) for Russia.