No, I don't. My TV doesn't even have an aerial going into it, we have no sky boxes or anything of that sort - so if you switch on my TV you get no channels. We use it as a screen for gaming, or for DVDS. There are no channels hooked up whatsoever.
And no, I don't watch live/catch up online. I just watch Youtube, or DVD's that go into my laptop, if I want to watch something.
I don't miss telly channels, genuinely. My ADHD brain makes it nigh on impossible to sit through a movie in one sitting, let alone a programme on the TV with umpteen adverts going on during it. When I've been house sitting for family, I've switched the telly on and before I know it I'm up off doing something else. It does my bloody nut in - I find it honestly so beyond boring. That's not to bash people who do watch TV, to each our own. Just it's not for me - I don't want it, so don't use it, so I've no need to have checks done in my home, as I know I'm not doing anything wrong, simple as really. If I did use it, yes I'd pay for a license, just to give me peace of mind really.
Funnily enough had the TV license people at our door just recently - one of only two times they've been (or managed to actually call when we're home) in about ten years. Had gazillions of letters though - they just go straight in the bin.
First time they called and told me they were from TV licensing, I told them I have no need for their services thank you - they asked if I had TV. I told them Nope, I have a screen, with no channels or anything hooked up as I use it for gaming. She told me 'I'll just have to come in and check so I can let them know'. My response was 'No you don't have to do anything of the sort thank you, I don't allow strangers access to my home just because they say so'. She said Ok and off she went. That was oooh, about 5 years ago now?
Today she got my OH. Same sort of deal, plus we now have a rescue dog that is extremely nervous of strangers and it sets her on edge (she is unpredictable), so simply said - 'Nah you can't come in, got a rescue dog here that wouldn't be reacting very well' (we could shut her away in a genuine emergency, though she doesn't like it - this isn't an emergency so why should we..) so when she realised she wasn't getting into our home, said to my OH 'I'll just take your details, what's your first initial?' - his response was 'No thanks, I'm not comfortable giving my personal details out to strangers at my door'. She told him to notify online we don't need one, but they'd still come out and check.
We don't notify them online, because we don't agree with a body of which we don't use their services nor wish to, demanding access to our home, to check we're telling the truth, check our devices, and enforcing on our privacy. A wish for privacy does not breaking the law make.
We're both times been polite but very firm. This works quite well I've found.