For the entire duration of the Russia/Ukraine war "combat footage" that is actually from the video game ARMA 3 has gone viral fairly regularly, and now exactly the same thing is happening with Israel/Iran.
Who even needs AI generated videos when you can just act out absurdity and pretend it's real?
There's a morbid path from the grainy Iraq war and earlier shaky footage, through IS propaganda which at the time had basically the most intense combat footage ever released to the Ukraine war. Which took it to the morbid end conclusion of endless drone video deaths and edited clips 30+ mins long with day long engagements and defending.
And yes, to answer your belief that there is none - there is loads of "cinematic body cam footage out there now".
I still don't know if it's autogenerated from the original video or recreated manually but yeah it's pretty realistic for the first few seconds.
https://www.theverge.com/2017/12/4/16732912/ufc-video-stream...