The first video is about the bitcoin bubble and the second video is explaining the petrodollar and the US/Saudi Arabia relationships.The petrodollar conspiracy theory sounds pretty good to me.
It's not a conspiracy theory in my opinion since political science often uses it as a case study.
It's a fact that in order to buy crude oil, countries need to use the US dollar. Some oil producers tried to change it (the medium of exchange) but got punished by the US military.