Like when you thought you had bought a movie, but it turns out you don't have the right to watch it on your computer, or in another country, or in your car, or

Like when you thought you had bought a movie, but it turns out you don't have the right to watch it on your computer, or in another country, or in your car, or skip the trailers. But strangely when the plastic disk breaks you don't get a new replacement one - even though all you bought was a licence to watch the contents