I bought 1000 meters of wire to settle a physics debate
https://www.youtube.com/watch?v=2Vrhk5OjBP8

Youtuber Alpha Pheonix does a follow up video to the recent Veratasium one on electricity which has been discussed on this forum, running the experiment with 1,000 meters of wire and awesomely confirms the speed of light with his set up to boot.

IMO this video is much easier to understand than Veratasium’s one, and also it’s more “accurate”. Worth a watch for those interested.