This documentary in general focuses around copyright, and the right to remix old music from other artists and it makes some very good points. You only have to look at YouTube to see for yourself; how many video's per day do you think get pulled because it contained some footage, music or sound (even when it concerns fan-art!) that is owned by some company? What started as a battle against copyright-thieves now evolved into a battle of control and money.
Even Lars Ulrich from Metallica makes an appearance, in the form of an old interview concerning the whole Napster-debate which is hypocrite to say the least; tape-trading back in the day is what made Metallica so well known to begin with, so this is nothing more then a moneygrabbing issue from him.
If you want to know more whats going on behind all the anti-piracy campaigns, then watch this. Its well worth the watch.