I would go with MnFish1 on this one.
Seems like he actually read the PO's first post and replied accordingly.
IMO, don't mess with lights until you know what the water parameters are. Everything else is in left field, IMO.
Actually - the issue is that it's not clear 'what' was done to the lights - if he adjusted them lower - that would be the good thing (IMHO) to do.
Also - What I tend to do with corals - is put them somewhere - measure the PAR to hopefully match fairly closely where I got them (if possible to know), and then let them adjust to any flow differences. As someone else said - a lot has been done - and you're right the parameters have to be wrong - but (I can't see the video) - the pictures of the coral look merely like they are reacting to a change - rather than 'dying'.
One other parameter is when the corals were bought - could it have been a salinity change. to
@Pass12345 I would suggest strongly - if you make a change - let things adjust - and try not to 'chase your tail'.
Additionally, though I don't agree with test strips per se, If you get the results that you posted - and they are correct - that would be the first thing to re-adjust (IMIHO) -but with the results posted its really unclear what's going on. I hope you didn't try to adjust your pH with a chemical based on those tests (like add acid to decrease KH, or increase something else (bicarb, kale, carbonate, etc) to increase your alkalinity.
Not trying to beat up on you you're new - just giving my advice. It's extremely tempting to change something when something seems off - if you are relatively new to reefing. just make them one at a time. Welcome to the site - and I hope things turn up - and you can give more information!!