Google signed agreements with Sony BMG and Warner Music Group and will include a large collection of music videos in Google Video.
"Starting this month, users can watch thousands of videos from SONY BMG MUSIC ENTERTAINMENT on Google Video. In the coming months, users will also be able to access content from SONY BMG MUSIC ENTERTAINMENT artists through Google's partner websites in its AdSense network."
"Starting this month, users in the U.S. can watch any of the thousands of music videos, artist interviews, behind-the-scenes footage and other artist-related content from WMG on Google Video. In the coming months, users can also access audio-visual content from WMG through Google's partner websites in its AdSense network. In addition, Google will develop technology that, when implemented, will enable users to include certain content from companies such as Warner Music Group in the videos they create and upload to Google Video."
Music videos will be ad-supported or available for purchase. It's interesting to see what this means: "Google will develop technology that, when implemented, will enable users to include certain content from companies such as Warner Music Group". Maybe lip sync videos or video mashups will be covered by this agreement and will be legal.