I've been working on discovering new content from humans (I mean, honestly, it's hard to tell these days…), and this is a gem www.fieggen.com/shoelace/sec...
(though actually came via hackernews, I've got myself a tool to surface from different feeds)
Tutorial for tying the Ian's Secure Shoelace Knot, in which the laces are formed into two loops, both of which are passed through the “hole” in the middle.