Oh, all these things would be 'real' regardless of whether one believed in them or not. Air does not need belief to exist.... prana is simply a form of energy, not unlike heat or electricity.

[He only bothers with people he finds 'interesting'. In fact, that creepy smile? That means he's found Asgard as a whole fairly interesting]

That's not really the best analogy. Television is a passive form of entertainment. I prefer revealing truths and watching how a person handles that knowledge.

[And stirring the pot... he loves stirring the pot]