Free TV

Get yourself a ROKU. 2000 channels. Most are free. Such as lifetime for example.

 

https://www.google.com/search?q=roku+tv&ie=utf-8&oe=utf-8

 

If you're talking about video streaming over the net (and the inherent cellular data costs), there are a lot of options and a ROKU player device is the place to start.

https://www.roku.com
you can get them almost anywhere

Just because someone wants you to "sign up" does not mean there is a monthly or one-time charge. You want to watch free, you will be forced to watch "commercials". Netflix is the cheapest route to watch many older sitcoms, ad free. But be aware Netflix will occasionally remove a series, without notice. "Coach" and "Wings" for example ... they both got cut from Netflix recently, for one reason or another

I see Hulu no longer offers a "free subscription" which is typical. But there are plenty who do still provide free access assuming you will sit through lots of ads. But you get what you pay for and don't get what you don't pay for.

 

"streaming" is what you're doing with youtube, Hulu, Netflix, etc. Nothing to it once you have a reliable internet connection. Can be over cellular or other hotspot. Truck stop wifi hotspots rarely provide enough throughput to support reliable streaming without constant buffering pauses. First thing is to figure how much you're willing to pay for cellular data and to buy as large a plan as you can afford. Streaming 1 to 2 hours a day, 5 days a week, can go through 5 gigs of data (month) pretty consistently.

If you decide to proceed further, be sure you select the lower resolution options to reduce data consumption, at the cost of reduced video quality. For the older sitcoms that were shot before HD, this is not an issue anyway.