"People often come to Google to find music videos, and this week we improved our results so now when you're searching for your favorite band or album, you'll find popular clips organized in a new way. For example, search for [michael jackson] and you'll find some of the King of Pop's most famous videos, including clear text indicating the length of the video, the album and the year it was published. The feature scans the entire web for video content and algorithmically ranks the best sources for each song. Rather than return repetitive links, we group results for the same song together, making it easier to scan and choose the song you're looking for."
The results aren't always the best music videos and Google should provide options to sort them by year, album, genre. Another issue is that, even though Google shows results from different video sites, the main link usually sends you to YouTube and that's not fair.
