That's an excellent one, but I found one on this site (somewhere) that I like better:
http://www.youtube.com/watch?v=Xv2gK...eature=related
The reason I like the second one better is because when you're doing seams that have a great angle to them, it easier for me to have trimmed the seam first. Then it seems easier to position the new fabric and have it cover and it seems easier for me to see what's going on.