Find out if a film is on iTunes, Amazon Prime, Netflix or Now TV

Searching for Blanca Portillo

Is As Luck Would Have It available on iTunes, Amazon Prime, Netflix or Now TV?
Is Broken Embraces available on iTunes, Amazon Prime, Netflix or Now TV?
Is Elsa & Fred available on iTunes, Amazon Prime, Netflix or Now TV?
Is Volver available on iTunes, Amazon Prime, Netflix or Now TV?