Yes video and pics are best under bright white lights. This can be the tang only damage if you’re saying you have seen the aggression. With angels being large scare fish unlike tangs being more fine scale fish, you will see the damage more pronounced vs what you see with tang on tang aggression. So if the tang gets a good swipe at the CB and pull off more scales the damage will look bigger. If no infection from bacteria takes place eventually the fish will heal on its own.
I would recommend high end food. For pellets for immune boost, a couple of drop of selcon or vitachem. Let the additive dry out on the pellets then feed the fish, two brands I really like because they have few fillers vs brands that have many fillers of all sorts, are new life spectrum, and easy reef DKI 1.3 beta glucan good immune system food. Then black worms are in between feeding might take a few tries to get the fish to eat black worms, but a real good food source for fish. And of course frozen that you can add some selcon or vitachem too.
Again post some pics under bright white light, and as for video 20-30 seconds and post it to YT. You can post videos up to 4k so the quality allows for easy viewing.
