it's an old video, from first year of war i think. (or at least there was s very similar one back then) he was still alive and walking for at least next minute, but i don't think his arm was functional anymore or that he survived this considering state of russian medevac. i'd also expect some kind of lung injury - air can get compressed allowing for whatever was around it to accelerate inwards and collapse with some force, solid tissues less so

e: nah different one, which is weird that it got caught on camera twice, it's their basic at weapon, designed yo be simple to operate, you're not supposed to be able to fuck it up https://www.reddit.com/r/CombatFootage/comments/15kqp0n/russian_troop_firing_an_rpg_forgets_about_back/