Thanks for the pics. I'd agree; looks bacterial. May go away on it's own as the fish's immune system recovers from the treatment, or it may require medication. You could try a dip in Ruby Reef Rally if the fish is looking to be struggling. From the video, that does not seem to be the case? If the fish is eating, I would be sure to give it high-quality food (soaked in a vitamin supplement like Selcon or the like) and observe it for a day or two. If there are any signs of it getting worse, I would dip in Ruby Reef Rally and then look towards
other treatments.