Codes and Lyrics is a site that bills itself as the best source for music video codes and lyrics on the web.  They have a huge collection of music videos that can be viewed and added to your web site or blog.  Each video includes a button which will automatically generate the code for you, making implementation a snap.  The code generator also allows you to customize the look of each video, including disabling the auto-play feature as was done with this Nelly Furtado cover of Crazy by Gnarls Barkley or Fallen by Sarah McLachlan.

http://www.codesandlyrics.net/