Bill Ruppert used to do demos for Roland / Boss, but I'm not sure if they were "official" videos or not. I'd love to get copies of his VG-99 demos because I didn't actually download them when I saw them and now they are nowhere to be found. : (I have only one thing to say about this SY1 demo from Boss.
Bill Ruppert rules.
Boss is miles, miles away from EHX in terms of presentations of this kind of pedals.
Bill is unbeatable.