I believe your A. diadema are actually A. sp. Jenaro Herrera. Diadema only have a small spot on the cheek, not a line and lack the green coloration along the bottom of them. Also, when the one flares his dorsal fin, the midlateral blotch extends up into the dorsal fin, which it doesn't do in diadema or metae. Hard to say deffinitively though on the video. Just a heads up in case they breed.