Youtube video downloader bash shell version
./get_video.sh https://www.youtube.com/watch?v=xxxxxxxxxx [ -f ext,quality ]
e.g.
./get_video.sh https://www.youtube.com/watch?v=dgKGixi8bp8 -f mp4,medium
Doesn't depend on python. uses wget, sed, egrep, head, tail, cut, grep, perl, rm should be quite portable, only tested on Debian Testing (2016/11/26)