Music is an essential element of video marketing.
There are many musical genres. Here is a sample from a much more extensive list on MusicGenreList.com.
Alternative Music
Blues
Classical Music
Country Music
Dance Music
Easy Listening
Electronic Music
European Music (Folk / Pop)
Hip Hop / Rap
Indie Pop
Inspirational (incl. Gospel)
Asian Pop (J-Pop, K-pop)
Jazz
Latin Music
New Age
Opera
Pop (Popular music)
R&B / Soul
Reggae
Rock
Singer / Songwriter (inc; Folk)
World Music / Beats
Stev Forster is an Australian entrepreneur, who happens to be an excellent composer. Check out his music: Panorama Stock Trax Vol. 1.