Quick tutorial on generating QR codes

I've just put up a brief video on making your own QR codes. I guess everyone has seen QR codes, but not everyone has used them, but they're quite useful! I give a brief explanation in the vid.

For some reason, a lot of people use services on other people's computers to do this when you really just have to install qrencode, which is a pretty simple program to use. I illustrate it in the video for those of you too intelligent to just run qrencode -h.