Here the demonstrator is placing the belt under the folded plaid, at about the right spot for the wearers waist. Now some people do this step first before folding the plaid others after. I prefer after as it tends to get in the way as you are folding the plaid.
You then lay down on the folded plaid, with the bottom just touching the back of your knees, and the belt at your waist.
The wearer then folds over one of the panels first (for most this is the right) and then the other panel across your body
At which time the belt is then secured about the waist. Now what is done next is dependent on the wearer, it is an opportune time to take a short nap while your laying there.
Copyright 
1998 Historic Highlanders