. I had the pleasure of looking at various cichilds including german blue ram and bolivian ram, also came to know about the Apistogramma panduro. The guy said that the females colour up good yellow and the only species i saw where the females are more beautiful. But god they are expensive Your community behavior looks quite good and normal. Its possible some of our livebearer people could comment on your pH and temp with respect to the high-fin platy but overall I don't see issues at a quick glance. WD
Neo, when it comes to using a planted tank to prevent any problems with stocking fish, maybe a picture of a planted tank would help you judge it. This is what I call a planted tank, although slightly less plants might work without first cycling your tank's filter. Much less plants and you will be looking at what MW called a tank with plants, not at all the same thing.
Your video of the platies and guppies shows mostly normal looking fish with no ich present. The only thing I saw in that whole video that might possibly be a concern is the bottom edge of the first fish's tail. I would keep an eye on that and if it becomes worse would post a picture in the Tropical Emergencies section. It is definitely not ich but may be some kind of fungal infection if the symptoms change for the worse. I try to keep my fish water clean and find that things that look like that will heal up on their own with nothing but water changes unless it a particularly virulent infection of some sort.