I don't think I've ever owned any headphones with a long enough cable to plug into my tv when I'm sitting at a comfortable viewing position

3.5mm to bluetooth adapters are also an option for wireless headphones if you don't mind the quality loss and other bluetooth annoyances.

Thankfully, you can buy a cable extender for like $2, because it's a standard that has been around for 150 years.

Example: https://www.monoprice.com/product?p_id=648