Its a... technique, though not the neatest one. [She has to hold back a laugh as she puts down her own things, reaching over to grab the pan from Eley and a new stick of butter, unwrapping it to prepare for a proper demonstration (good thing she brought extra).]

The most common way is to just grab the butter and rub it over the inside of the pan, like this. Some people spread it with the fingers, sort of like you were.