"We can make the argument that we should save the old-growth forest as a matter of national defense" - Paul Stamets http://www.ted.com/talks/paul_stamets_on_6_ways_mushrooms_can_save_the_world/transcript?language=en
How to Download YouTube Videos: 1. Go to video page. 2. Type "pwn" immediately in front of "youtube" in the url and hit enter. 3. Choose how you want to download the video (or even just the audio). No software, no gimmicks. Definitely one of the most useful and easy-to-use tools I've ever learned about.