Video bandwidth is expensive. Plus YouTube pays the creators too for producing the content. I subscribe to YouTube, and haven’t had a real TV subscription in years. Totally still saving money. In terms of hours per dollar per month, it’s gotta be pennies for me. Plus YouTube music and downloading to my phone to save data is kinda nice too.

I’m on about #2 or #3 IPhone from eBay.
No issues, but I always made sure I purchased ones that were in the condition I liked in the photos and also were listed either for the carrier I had in mind or unlocked and then threw in a mvno sim as soon as I’ve got it. eBay is pretty good about processing returns that are legit and I’ve always tried to vet the device the day I received it. Issues with other electronics I’ve filed a notice report immediately and either returned or accepted a partial discount. Looking to sell my old devices on eBay soon. Not going to make a fortune, a few bucks helps, yanno.