If you would like a beginner dance "workout" try:
~Bellydance Fitness For Beginners Basic Moves
~Bellydance Fitness For Beginners Slim Down
If you would like actual dance instruction (keep in mind that this focuses on proper form and proper execution of the movements-so donot expect to "get your heart rate up" or something like that):
~Bellydance Magical Motion (with Atea)
~Absolute Beginner Bellydance With Delilah
~Fat Chance Belly Dance Tribal Basics Volume 1
~Ruby Jazayre video series (you want the 3/4 part series-not her choreography video) available at
www.rubyjazayre.com or
www.dahlal.com
Keep in mind that "real" belly dance videos are more expensive than mainstream videos meant for "exercise".