The Uni knot video guide form http://videofishingknots.com/ | Uni Knot. How to tie the Uni Knot. This video will show you how to tie a Uni knot. The Uni knot is a multipurpose fishing knot. Use it for tying the fishing hook or fishing lure to the fishing line or use the uni knot for tying to fishing lines together. The uni knot can also be used when you wont to tie the fishing line to the reel spool. You only need to know one fishing knot - the Uni Knot is the one. See more fishing knots videos a http://videofishingknots.com/uni-knot.html. The Uni knot.