It appears that some copies of Volume I of my Japanese Rope Bondage DVDs have a media fault which causes skipping and breaking up, especially in the safety section. Fortunately, this section is repeated on Volume II and plays perfectly. My suppliers are re-pressing and will have these available next week.
Please email dvdreturns@esinem.com with your address and the email address used to order, so I can get a replacement out as soon as possible.