Apparently Courtney Love didn't pay her sound engineer, so he decided to get a little revenge. How? He isolated just her vocals and guitar. The result is you get to hear exactly how messed up she is. It's the kind of video that can quickly destroy her "brand". Nobody expects her to be a perfectionist, but hearing just how bad she is certainly damages what little credibility she has left.
The lesson to remember here is to always be fair and respectful to the people you work with. In today's social media world, one disrespected employee can do serious damage to your brand.