Joseph George collapses during fight in scary ringside footage

Joseph George collapses suddenly during the fight. This one is hard to watch. According to the caption on the clip, boxer Joseph George suddenly collapsed and passed out during the fight, and the frames show how quickly things changed. Earlier in the clip, a man in the corner is working with a bottle while the fighter sits low on his stool. Another frame shows a man holding the bottle to his mouth while an ice pack is pressed against the side of his head. Then we see someone down on the canvas with a person in dark clothing standing over him, and the overlay on the screen reads Oberlton vs George. We can’t hear the audio and we don’t have the full story, so we won’t guess what led to this. What stands out is how fast a fight can turn serious. When a fighter goes down like this, what do you think matters most for corner and ringside teams to do right away?