I'm deep into the Amazon ecosystem, so I use a FireTV Cube. There, the Amazon video content is some kind of default invisible app accessible as a tab at the to

I'm deep into the Amazon ecosystem, so I use a FireTV Cube. There, the Amazon video content is some kind of default invisible app accessible as a tab at the top of the screen and via searches, so it sort of "just happens". When I go to "Videos", there's just an extra lane of channels I've subscribed to below my watch list and suggested content -- if I pull them open, it brings up what's basically the home page again, but with only that channel's content displayed. It's not a great app, I think your description of 'so-so' fits the experience, but it's better than some of the dedicated streaming ones (looking at you, DirecTV and Funimation!)