I had the same question when that advertisement was aired!! It is definitely a Khukuri!
Although machete has slight variations, from my understanding, its supposed to be something similar to;
http://4.bp.blogspot.com/_7LS4WnHcgiw/RYwGmZt05MI/AAAAAAAAAP4/n-zu1lZIfYo/s1600-h/machete.JPG