I didn't realize that was the source video for this other video I periodically watch (https://www.youtube.com/watch?v=uY8ENJK0hvM https://www.youtube.com/watch?

I didn't realize that was the source video for this other video I periodically watch (https://www.youtube.com/watch?v=uY8ENJK0hvM https://www.youtube.com/watch?v=uY8ENJK0hvM). TIL.