Just a couple of notes about this tutorial. Firstly, it was my first attempt at a tutorial and I messed up the sound which got me a lot of thumbs down so I've now done my best with some ambient sound overlay.
Second, just to clear up the relationship between this project and Grant Thompson's version: I'm a big fan of The King of Random so when he asked to use my rocket as a basis for his project I was more than happy to agree and I love what he's done with it! That's why you'll see his approval in the comments.
These rockets really do consistently travel well over 15 feet with critical launch malfunctions being pretty rare - well, even NASA doesn't get 100%!
Update: I've finally got round to making another tutorial and this one's shorter and has a narration! If you like things that explode then you'll like my very easy to build Butane Lighter 'Spud-gun'. youtu.be/rNt-VEGeCvg