Broadcast towers have lights on them so aircraft can see them at night, and from time to time the lamps in them burn out and need to be replaced, which means someone has to climb the tower. This isn't the scariest example I've seen, but it's interesting to watch, and the view from up there must be nice. I suspect this video was shot with a drone.
Two years ago I posted another tower-climbing video, this one from the climber's viewpoint. See this link. There are others on YouTube for those of you not yet dizzy enough.by