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.
European Music (Folk / Pop)
Hip Hop / Rap
Inspirational (incl. Gospel)
Asian Pop (J-Pop, K-pop)
Pop (Popular music)
R&B / Soul
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.