YouTube's top 5 content partners generate nearly 1.5 billion views a month

"May 2012 marks the first month that Nielsen is publicly reported streaming measurement on thousands of YouTube partners. The top five YouTube Partner channels, led by Vevo, Warner Music Group and Machinima, combined for nearly 1.5 billion total streams. YouTube provides content creators with tools and programs to improve their skills, build their audiences, and monetize their videos."

Source:  Research by Nielsen, reported in NielsenWire, 25th June 2012