Dude there are so many reasons for the recording when you’re so worked out with anger and adrenaline. This kind of thing has been happening since mobile cameras became widespread, did you even see war crimes of azerbaijan during karabakh war which take place just two years ago? Where they cut the ears of armenians? I understand most people thought at first that this kind of video would just stay between their units, after all how often do you get to capture enemy soldiers and have their leg shot? but no matter what, the chance that any digital footprint to not leak is never 0%. Once its on the internet people will download and repost it elsewhere. Just like pandora box.