Cant really fault the video - seems pretty balanced.
To us, airsoft is just a technology which allows you to play a game. It could be replaced with another technology at some point, depending on a lot of factors, maybe not. Its just a component of a wider subject.
Your video is really more a comparison between skirmishing and milsim or other role playing games.
Of course, Airsoft is a larger part of skirmishing than it is milsim. Our parent group also organises wild west games (is that westsim ?) where they have migrated to blank firers and of course re-enactors dont tend to use airsoft.
The video is rather simplified but we suspect that it has to be because of the running time, so fair enough.
In reality, there are lots of "flavours" of milsim and they cater for different audiences who still want to play some form of milsim. It doesnt have to be special forces loadouts and 48 hours plus to be milsim.