This video will show how to tie a Celtic Button Knot, using a length of paracord for the demonstration. The 'Celtic Button Knot' looks similar to the 'Lanyard Knot', but is tied along a single strand of cord instead of using two strands. They can be useful as decorative stopper/terminal knots. This knot is also found in 'The Ashley Book of Knots', knot #545.
More knotty stuff on my blog: http://stormdrane.blogspot.com