What is a TV channel? Several streamers align their content into different verticals. When I log into Disney+, the first thing I see is a selector for Disney,

What is a TV channel? Several streamers align their content into different verticals. When I log into Disney+, the first thing I see is a selector for Disney, Pixar, Marvel, Star Wars, and National Geographic. Are those channels? What is a "collection" of TV channels? ESPN+ allows me to watch what is currently airing on ESPN, ESPN2, etc. Their content is primarily live rather than on demand, but they only offer a very limited scope of content that all falls under the same category and only originates from the same family of channels. Are they actually cable? Don't basically all cable companies offer some form of on demand content? Are they all streamers too? Honestly, I don't care about the answers to these questions. They are rhetorical to show that it is hard to draw nice clean lines around these which is part of my original point that ads isn't what defines cable. Ads come with live content, not with the distribution channel for that content.