Tiamat
I've seen the future...
...It's very disturbing that, to me, this looks just like an airsoft match someone uploaded to YouTube. Am I that desensitized?
Eh, unfortunately that's just a symptom of the culture, right or wrong, nowadays. At first glance sure, it's easy to compare images to a computer strategy game or FPS, it's easy to compare something like that to paintball or airsoft at first glance...
...until that is you realize that YES, it's real men (and women) dying in those pictures, those aren't paintballs or plastic BB's getting fired, those are live rounds, etc.
in that last video, that's legit CQB in a trench. Tight confines with long exposed spaces with adjoining trenches from different potential angles of attack. Nobody wants to get stuck clearing something like that unless they have to. Preferably done with liberal use of grenades.