those who make good highlight videos will tell you that the topic of the video dictates what music should be selected, not just selecting music and putting highlight clips to it. Thats why theres so many bad highlight videos on youtube.
This is actually accurate. I think I can speak for most of us when I say we'll pick a theme for the video, then figure out what would be the best song to represent the theme.
For example, my sig displays Cam highlights to the music of Beat Mode by B.o.B, which talks about how nobody thought he'd amount to anything, yet he was able to overcome the odds and become the beat that he is today.
The music sets the tone to the video.