Video Games, since all the others have different ways to make money:
Software: There are a lot of non-private customers to sell to: companies, schools, universities, state administration, etc. - that doesn't work for all kinds of software though.
Music: concerts, radio, ads
Movies: cinema, TV, product placement
The only way I see video games making money without being effected by piracy is a ton of ads inside the games or a subscription-based system like most MMORPGs use.








