This is a song to a poem by W B Yeats. What pretty pictures!
I am editing to add this, because when you go on youtube, it show other videos like the one you find, so this one was on one of the Salley Garden ones. BUT, Oh this is almost the same song, but they kill people!!! OH the grunty little malebeast!!!!
Then edit some more to add this to them, by Nick Cave.
This is a fun thing to do on youtube, just start somewhere and start following the other songs where they lead you. But sometimes it gets really weird.