I can't imagine why not. In fact I would think the barbell's better b/c you can adjust the weights as you get used to the workout--you might want to use a lighter or heavier weight than the instructor & at least you'd have the options.
Like I said, the barbell seems so much more versatile. I don't know what on earth I'll do with all my bodybars when I eventually move--they're practically brand new b/c I so rarely use them & I hate to keep stuff around when my storage space is so limited. x(
BTW, which workout is it? I wonder if it's something I could use? ;-)