Why No One Has Measured The Speed Of Light

this video was sponsored by kiwo more about kiwo at the end of the show I know what you're thinking clickbait no one has measured the speed of light that's ridiculous the speed of light is exactly 299,792,458 m/s we are so sure of it that since 1983 we've actually used the speed of light to Define how long a meter is it's just the distance light travels in a vacuum in 1 over 299792458 e of a second that definition ensures that the speed of light is exactly this number no decimals but hear me out in this video I will prove to you that light may never actually travel at this speed and I can say that because no one has actually measured it we can't measure the speed of light the same way we measure the speed of anything else I think we're recording everywhere what are we doing this is a video about measuring the speed of stuff okay tell me about how you measured the speed of the baseball fired out of your Cannon well to get the speed of the baseball you need to know two things you need to know the distance between two points and you need to know the time that it takes the baseball to travel between those points so basically we took distance divided by time and that's the speed of the baseball and in our case we were shooting with a high-speed camera so you basically just count the frames and then your clock is internal oh you're going relativity you're going to do something weird aren't you you saw it coming I can't believe it oh man the thing I want to ask you about is the speed of light okay could you measure the speed of light like this imagine you have a laser that can fire a beam through a perfect vacuum for 1 km start a timer the instant you fire the laser beam then exactly when it hits the end stop the clock except how do you know when Light reaches 1 km if you and the clock are at the starting point okay so you need two clocks one at the laser and one at the end which stops automatically when it detects the laser light but now how do you make sure your two clocks are synchronized well you could connect ...