I Comcast and have a data cap. 1000 GB. I have a daughter with health issues and she is at home watching a lot of TV. She has been watching a series on Prime this month and we went WAY over for the first time ever. We used like, 1500 GB. Comcast notified me I went over. you get 2 free months. after that it is an extra $10 for every 50 GB over. So at this point if I was getting charged it would have added an extra $100 to my cable bill
I don't know what determines data usage.
I have (A) an internet connection that I use to watch TV shows on YouTube Live, (B) a non-4K TV (1080p/i I guess), and (C) 2 Roku devices - a Streaming Stick+ that supports 4K content and an Express that doesn't.
So if I want to watch a show that is available in 4K (assuming one has the right equipment), is my data use going to be higher (than non-4K content) no matter what I'm using to watch it, or would I only be using more data if I was watching that show using a Roku device that supports 4K (i.e., the Streaming Stick+ but not the Express) irrespective of what kind of TV I have, or would I only be using more data if I am watching the 4K show with a Roku device that supports 4K content on a 4K TV?
From a U.S. perspective, my $35 per month "unlimited data" ($70 per month because I have 2 phones) gets throttled so severely after 35 GB that it renders internet use worthless for the rest of the month.