Its hard to address all the questions you had in the video but i'll try... I can't remember them all now. hahah
What are the supplements? It was hard to read. From what I saw.. they are kent brand. That's about it.
Generally, you should never dose for something that you are not testing for. What do you think you need the supplements for?
Corals-
I do not run skimmers. I have 2 tanks, no skimmers. Both loaded with corals. I keep softies, like you.
You do not need a skimmer. But skimming will cut down on water changes, reduce the waste in the tank, and help with water clarity.
A skimmer is never a bad idea. For what you are doing, it's not a necessity
The corals that you have are star polyps (pink I think), and Zoanthids (zoas). They are easy to keep corals and don't require perfect water or lots of intense light.
I have 1 of each of those lights that you pointed out. The black one is a Coralife lunar light and the gray is just a coralife PC fixture. (1 on one tank, the other on the other tank). They are both great fixtures. Especially for someone who likes softies. I keep leather, shrooms, zoas, galaxia, Green star polyps. acans, gorgonians and a sea fan... plus more. You will do well with them. Then when you're ready, you can upgrade the light to keep more corals.
Good luck with the damsel. Catching a damsel will probably require that you remove the rock and get him, or that you get him at night. Wait til he is "sleeping". keep the light 100% out in the room. Shine a flash light in his face and it'' stun him momentarily and allow you to scoop him up and out.
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Your tank looks healthy and happy. seems very stable, with good coraline growth. I didn't even see any nuisance algeas or anything. Good job!
Just don't buy any more damsels.