This video looks at the opening sequence of Wanshu / Enpi (including the opening "salutation"). I see this sequence as mapping out various options -- in the form of a sequential drill -- that can be applied should the enemy secure a grip on your clothing.
The video was filmed on a small handheld camera at a seminar I did in the UK in July 2013. It was an uncharacteristically warm day and hence a fan was running to keep people cool. The sound of the fan is therefore present throughout the clip. I hope you are still able to hear everything OK and the noise does not prove too distracting.