There is an error in one of the diagrams in this video. They are talking about thorium fuel cycled molten salt breeder reactors, but one of the diagrams shows a moderator. Moderators are used in thermal spectrum nuclear reactors, they are not used in breeder reactors where fast neutrons are required for even numbered isotopes to absorb them and transmute from fertile non-fissionable fuel into fissionable fuel. You can not burn thorium-232, U-238, or even actinides in thermal reactor, but you can transmute and THEN burn them in a fast breeder reactor.

Also, the narrator is somewhat a moron and makes the statement that in a conventional reactor that fuel is in a solid "control rod", actually no, the fuel rods are seperate and distinct from the fuel rods in a conventional reactor.