What are the odds these are two males and this one is submitting to the alpha and maybe getting scraps later? He does seem very submissive to the active one even when they’re not eating.
That is unlikely, Group dynamics on these is tricky though - they naturally live in loose groups, and with less than 3 fish, that can break down. However, from what I can see in the video, that isn't the case. I doubt that the fish is eating scraps, if you aren't seeing it eat, it most likely isn't.
jay