Wow. That was really amazing; about as sentimental as it gets. And I loved the Nathan Fillion cameo.
Also, if people are wanting to download the vidoc, I'd recommend Youtube Downloader HD. Be warned though, the 720p version is just under a gig! 0_o
not going to last for long; chrome doesn't allow that shit to happen for youtube. Something law or policy or something.
I just use online converters like http://www.flvto.com/ for MP3s and for videos I use http://www.youtubedownloaderhd.com/. That last one I think is important cause when I tried to find a program a lot of them looked fake.
As for non youtube vids, the best extension so far is "FVD Video Downloader" I use this for my online lectures (because sometimes profs take them down on a schedule)