Thorium is now unfortunately considered a restricted substance in the U.S. which sucks for the metallurgy and thermionics businesses. The government fears somebody could make a dirty bomb from it. In reality that is absurd, but when was the last time the government took actual data and reason into account for banning anything. I did not even bother watching this video. Thorium does have a great many practical applications in a great number of fields though. Its a shame.