"The Tide is Turning," Occupy version

This beautiful YouTube video by Stonehartfloydfan is set to a Roger Waters song that I didn't know much about. So I looked it up on Wikipedia:

"The Tide Is Turning (After Live Aid)" is a song from the 1987 album Radio K.A.O.S., by Roger Waters. Though Waters had offered his services for the Live Aid concert in 1985 and was turned down by organizer Bob Geldof, the event still inspired Waters to write this song. After he had recorded the Radio K.A.O.S. album, which ends with a simulated nuclear attack in the song "Four Minutes", his record company informed him that the album was too bleak and needed a more upbeat ending. Waters then recorded and added "The Tide Is Turning" to give the album a more optimistic finish. Waters also performed the song with Joni Mitchell, Cyndi Lauper, Bryan Adams, Van Morrison with The Band and Paul Carrack and the Rundfunk Orchestra & Choir in the 1990 concert, The Wall Live in Berlin.