Here some usefull scripts:
Downloading stuff from youtube
You need youtube-dl and id3lib
#!/bin/bash YOUTUBE_USER=" ... " URL="https://www.youtube.com/user/${YOUTUBE_USER}/videos?view=0" ARTIST=" ... " ALBUM="Youtube Videos" youtube-dl -o "%(title)s.%(ext)s" -ikx --audio-format=mp3 ${URL} id3tag --album=${ALBUM} --artist=${ARTIST} *.mp3
Set a Playlist as URL and go in an empty directory. It will download all the videos, create an mp3 version and tag every mp3 in the folder.