Front brakes binding

[grumble]

That YouTube threw me. 
Watched what Julian did. 

Will say, the “lock nut” was only finger tight on the rod. 
That may have been the issue. 

Don’t have much experience with Bays, and totally different to beetles. 
Never had an issue with T3

You can't always believe you tube diagnosis if the master cyl hadn't been off there is no reason that the adjustment was incorrect in the booster, the most obvious is usually the one to follow.