video clips are from the movie "City of Angels" . Really loved the movie(watched it few years back).
http://www.songfacts.com/detail.php?id=2771As McLachlan explained on VH1 Storytellers, this song is about the Smashing Pumpkins touring keyboard player Jonathan Melvoin, who overdosed on heroin and died in 1996. McLachlan explained that there's nothing constant when you are on the road; everything becomes the same. (thanks, Stacy - Sunbury, Australia)