Though he rarely identifies clips, director Melvin Van Peebles still makes a baadasssss film scholar on CLASSIFIED X (1998, WinStar, unrated), a 50-minute analysis of race in American cinema from Thomas Edison’s movies to Lethal Weapon … He loves you, you know the score. In BARNEY’S GREAT ADVENTURE: THE MOVIE (1998, PolyGram, G) a saccharine purple dinosaur tracks down a magical egg … On ANDREW LLOYD WEBBER — THE ROYAL ALBERT HALL CELEBRATION (1998, PolyGram, unrated) stars belt out the likes of ”Memory” and ”Don’t Cry for Me, Argentina,” all in tribute to the lord of schmaltz … James Cameron’s TITANIC (1997, Paramount, PG-13) ships to video Sept. 1. (Screening tapes were not available at press time; a full review will appear in EW #450.)