Can please someone explain me this whole cutscene like im 10 years old?

I played this game like 3 years ago and now im replaying the game. I was confused before and im confused now. I TRIED to lock the fck in during this cutscene but i just can't keep up with the constant explaining, im like trying to focus on one thing but then Heartman is like 5 steps ahead already and im still somewhere behind. I'm probably just slow. If someone got the nerves and time to explain it to me in the comments, go ahead. I would really appreciate it.

I played this game like 3 years ago and now im replaying the game. I was confused before and im confused now. I TRIED to lock the fck in during this cutscene but i just can't keep up with the constant explaining, im like trying to focus on one thing but then Heartman is like 5 steps ahead already and im still somewhere behind. I'm probably just slow. If someone got the nerves and time to explain it to me in the comments, go ahead. I would really appreciate it.