I loved the part where the psx is dropped off the top of a building (with excellent camara work/sfx), while the announcer say's: "fly plaything, fly" . I loved the psx, but found that little bit funny, as well as thinking that NiGHTS into dreams is one of the best games ever made imo. Here's a link that contains the commercial (need to sign up with fileplanet though):
http://www.classicgaming.com/saturn/nights/
You can also check on this site (no need for sign up). I haven't searched thourgh the whole site, so it may or may not be there:
http://www.majkel.mds.pl/html/reklama/indexUKG.htm