Unless I misunderstood, the behavior changed from good to wild very shortly after the water change. Hence, the thought that something in the water change was responsible.
You had plenty of places for the fish to hide in the live rock in your tank. And, as we've indicated, the type of food would not lead to this type of behavior.
In the last video, they seem to calmed a little, but are still bouncing around. By now, the fish have acclimated to any differences in the water. So, unless you detect something drastically off in the water parameters, or perhaps a trace of an unknown chemical that was accidentally introduced during the water change (soap, bleach, vinegar, etc), I would just observe closely over the next day and not make any changes. You are not yet at a crisis point where doing anything would be better than doing nothing.