Look on amazon
I think live classes are more fun - maybe there's a local yoga studio or YMCA that you could try?
Okay, well, aoutdouze suggests Amazon, and that's a good place to look - especially check out the reviews on videos you're considering. Ignore 5 star and 1 star reviews - they're usually by "cheerleaders" or chronic whiners. Focus on 3's and 4's for more accurate descriptions.