In addition to TV and Web ads sponsored by the candidates, by the major parties, and by independent groups, the phenomenon of viral video makes it possible for amateur videomakers to reach millions of people. The pro-McCain video "Dear Mr. Obama," made by fillmaker Michael Brown and featuring Iraq veteran Joe Cook, has been viewed by six million people on YouTube in less than three weeks. Micah Sifry interviewed Brown, and writes about the video for techPresident.