To our knowledge, the lowly worm's characteristics have never been attributed to a badass fighting styles. That's reserved for tigers, cobras, monkeys and drunken people. Plus, worms are pretty icky. But, now they're cool.
Jiu Jitsu is a fast evolving sport/martial art. So fast that, just a month, or so ago, you and I had never heard of worm guards. And, now, thanks to Keenan Cornelius, it's all you and your kid sister want to talk about. It's like the dub-step of Jiu Jitsu (and Skrillix is the Keenan). I think you know what I mean.
Let's bottom line this - should you attempt to learn this technique? No. Probably not. Not because it's not kickass and crafty in all the best ways. Because, most likely, you're just not good enough at Jiu Jitsu for this to make a difference for you.
"Screw you, DSTRYR! I'm gonna train whatever techniques I want," you may say. And, it's true. You can do that. But, I offer this bit of clarity. Just as the yeoman boxer or judoka must master the basic elements of their crafts before moving on to more advanced, journeyman-level techniques, so to must the Jiu Jitsu fighter. The worm guard is not even in the last chapter of the Book of Brazilian Jiu Jitsu. It's in the Appendix. So there.
[Side Note: You're going to try learning it anyway, thanks to the internet.]