Apple has published official ‘Ping‘ guidelines for artists which depicts how artists can make their profiles and publish content under their profiles. For those who are unaware of this before, Ping is a social network service for Music.
According to the guidelines, artists are asked to create profiles only when they have several content post ready for their followers because “Fans will be far more likely to follow you if they can tell that your profile is active”.
Artists can upload the videos of size up to 2GB max having a format of .mov, .m4v or .mp4.
Apple has also suggested artists to create iPhones for videos whenever possible. That what we always expect from Apple that is the potential marketing skills to make their products into brands.
Apple also enlisted not allowed content which include p0rn0graphy, hate speech, racism, nudity or drug use. Artists are prohibited to link to other sites other than iTunes.
To read the guidelines in detail check the link.