Per subreddit rules about video posts, you’ll have to search for the video on YouTube. I watched the video which was 9 hours after posting.
The experiment was done in California using a light draft horse with help from Motivo. They modified a car so the horse can pull a rope connected to wheels sitting on a dyno. Comes out a horse makes ~5.7 horsepower for the specific type of horse they had.
Interesting, they’re actually one of the ones that annoy me the least, since they add the progress bar at the bottom, making it super easy to skip the ad portion.
But yeah, like the other person said, Sponsorblock is your friend.