The key is to literally just take off a little bit; even a snippet will do.
A movie trailer is a short preview or a snippet of a film that is meant to get viewers excited to the see the film when it is released.
It's also unfortunate that you cannot sample the entire song, but only a short snippet from each.
Sharing your DailyMotion video files with friends through your blog or your Facebook account is as easy as copying and pasting a snippet of code.
Likewise, the soundtrack from the film version of The Rocky Horror Picture Show includes the song Super Heroes, which was also from a scene that was cut and only a snippet of the tune is heard in most prints of the film.