Welp, I tried to find the video for like an hour with no luck. But I think it was made by the Rocket Jump guys at some point. It was a live action video of a video game like fps where there are two teams. One person spawns on each team and goes on to the map, trade gun fire until one dies then time resets and another person spawns on each side, BUT the other player still does what they did last round, runs out and trades gun fire. But the newly spawned guy kills the enemy that shot tge first spawn guy before that happens. Breaking the first spawn guy out of his preset loop, and they are now coordinating.

Very cool concept. If anyone knows the video please help me find it. Told a friend about it yesterday. Must have been filmed at least 8 years ago now.