ENGELBERT HUMPERDINCK: THE KING OF ROMANCE

ENGELBERT HUMPERDINCK: THE KING OF ROMANCE (1998, PDC Video, unrated, $19.95) That smooth three-octave range...that tall, dark, handsome body...those sideburns! If ever a swingin' music man was due a pop revival, it's oft-maligned ''contemporary singer'' Engelbert Humperdinck, who's wowed fans worldwide for three decades. But this somnolent 48-minute tour through his life and career lacks heat. The recent performance clips don't capture his live shows' extravagance, the personal interviews only tease viewers with his wit, and the otherwise thorough history of Arnold George Dorsey -- born in India, raised in England, and first influenced by Nat ''King'' Cole -- never explains: Why ''Engelbert Humperdinck''? The King of Romance won't have anyone throwing knickers at the screen. C