The problem is, even though I've got a Smart TV, it doesn't have a jack anywhere to plug in headphones. Sure, I could buy a set of BlueTooth headphones but who wants to spend that kind of money if you don't have to? Besides, my wired headphones sound great! I do, however, have an Optical Digital Audio port on the back of my TV – but my headphones have a standard 1/8- inch male stereo plug on the end of their cable.
So, here's what I did: I bought an Optical Digital to Analog converter on eBay for $15; it also has a coax input, and RCA output ports that I can plug external or portable speakers into. My headphones have no volume control on them but the headphone port on the converter does. I bought a 15-foot Digital Optical fiber-optic extension cable ($12.79 on eBay) to bring the converter over to the couch. The converter is powered by a USB port on the back of the TV so I paired a 15-foot USB extension cable ($8.50 on eBay) with the other one; I kept them together using small plastic wire ties.
Now, if I want to watch music videos late at night, I just unroll the paired cables from under the entertainment center, bring them over to the couch, and I toggle the “sound out” setting on my TV to “external” and I'm set to go, without disturbing anyone else. I also have a splitter that allows two sets of headphones to be used if a friend comes over.