Man sits in front of the camera for 24 hours. The result is 3 videos, each 8 hours long. Every minute his computer chimes, and he says what time it is. He claims this is the "most boring video ever." He's possibly correct.
I suppose that if you managed to sync the time in the video with the time in real life, you could have the video running continuously and use it as a speaking clock. Or you could just ignore the video, like the rest of the world.
The Saluda Grade is the steepest section of railroad in the USA. There have been numerous horrific tragedies involving runaway trains here. But this propaganda-cum-safety video from Southern Railway makes the whole affair seem a candidate for our boredom contest.