The email addy is prominently displayed on the vid. You could always send an email and ask if you're that curious. No telling what kind of response you'll get, however. Might be more than you care to know.
Classic style 10 has no waistband nor no leg gathers I had two cases of those before, they were prone to leaking if you didn't use them right I normally doubled them up. The waistband ones have a elastic waistband and leg gathers.