Had to do it a few times. I'm a familiar face - I've been banking there for a long time. I've even used my favorite excuse (which happens to be a documented fact) that I'm a retired reporter and the way they "report" the "news" over there is quite literally, and personally, offensive to me - their LONGTIME customer. And I nicely and politely told whatever bank tellers I was dealing with, asked them to pass it on up the food chain, and also went over to the side of the room where the manager-types sit, and buttonholed the manager who was on duty there at the time. Make sure they know AND their boss knows.
Now, those monitors are on CNBC or the Weather Channel or CNN or some such "neutral" channel.
Btw - the next time I went in and noticed there was a different channel on the monitors, I thanked them - the teller and whatever manager was on duty over at the side of the room. Asked what made them do it. I was told "we've had complaints." What do I care if most or all of those complaints came from me? I don't care! It's "complaints" - PLURAL. And that's really all that matters. And I must have complained to several different tellers and managers. Farther up the food chain, they're not gonna know if it was merely one customer repeatedly complaining, and nobody in the middle is gonna care enough or take the time to note who complained or that it was the same ornery woman or whatever. All they're gonna know or care about is that they had "complaints" - PLURAL. Make their mild disinterest work for you!