Content aside, what a great video! It’s not that old of a video but it reminds me so much of early YouTube, just friends messing around and posting it with top tier song choice.

Paywall article, but this already exists in Australia for pretty much the same use case: https://www.railtech.com/rolling-stock/2022/03/04/australian-mining-company-works-on-infinity-train-using-gravity-to-regenerating-batteries/?gdpr=deny