The only way here to accept that content will be pirated but trust users to do right thing as well.
Many content creators put off users with their stupid DRM implementations. I remember buying a game for some $34 in 2008. But that game had 5 copy limit. Now I am what you can call a "regular formatter". Formatted PC twice, changed laptop and now I do not own license to that game.
Let user make copies, but trust that they won't copy them further.