Group were refused entry twice
Jon Bon Jovi, Nicole Scherzinger and Sheryl Crow also feature on track
"Meat production depletes precious resources to increasingly unsustainable levels" - Paul McCartney
New video was directed by Sia director Ryan Heffington
Pair played 'I've Just Seen A Face' and 'Drive My Car' at US gig
The video interview accompanies McCartney's album re-issues, out next week
'Tug Of War' and 'Pipes Of Peace' albums will be reissued on October 2
'Love Song To The Earth' is in aid of Friends Of The Earth and the UN Foundation, and features over a dozen artists
Former Beatle recalls incident when he saw several armed men outside his home
Macca played the track during his Lollapalooza headline set on Friday night (July 31)