Must have something to do with domain rights. BBC links don't work overseas either, much to the chagrin of peeps across the pond who wanted to see Adam Curtis' 'Hypernormalisation' donkeymentary. [That's what the missus calls 'em, anyway].
He's the only docu-filmmaker I know who can make conspiracy theory look respectable. Jesse Ventura you say? A mere hammer chewer by comparison.