when i was a child, i saw it on mtv

in that video, the sky was dark and sometimes thunders

there were cages all round and many people out of cages

suddenly a white man with white pupil (yes, he had no black pupil)

he stood in the middle of cages and start rap.

i'm not an american so i ask my friends and they're all have no idea.

please someone can answer me and forgive my poor english.