Two things.
1. Do not go with T-Mobile they just had yet another data breach. This is about the 4th data breach in a year. I got a $25 check and lifetime credit monitoring for them leaking my social security number to the highest bidder.
The sad thing is it’s their own employees that are giving access to customers' personal information. I wouldn't trust this company with my library card number nevertheless my social security number.
2. If you get YouTube TV get the $30 Google TV stick as it works best with Google products.
Chromecast with Google TV - Google Store