OK. I admit it. I bought Chromecast to access the channels I don't already have in an attempt to acquire viewing without having to pay extra to do so. It doesn't work that way.
I have a 4k Smart TV. So, there are various apps supplied by the maker, Samsung that I can use. But they aren't the ones I want to use. And those I want to use can't be uploaded through their Play Store.
I thought Chromecast was the answer but it isn't since it does supply the channels I want to watch but restricts me to those I already pay for under my ISP provider.
I could already get those anyway, by attaching a laptop to the TV with a HMDI cable so, I am no better off than I was originally.
Where did I go wrong?