■Youtube瞬速ダウンロード
http://youtube-video-download.info/



■その他のソフト
http://gigazine.net/news/20120815-direct-youtube-downloader/

http://www.xn--gck8bc8a0dvef5dvcyecf.com/554.html

http://www.webcooltips.com/how-to-download-multiple-youtube-videos-in-one-go/ 

http://geeks.im/how-to-download-multiple-youtube-videos-at-once/ 

http://www.imtoo.com/download-youtube-video/how-to-download-multiple-youtube-video-simultaneously.html


■Python module
http://qiita.com/u651601f/items/1323ebe67ac0b4a38766

http://qiita.com/kasei-san/items/207dbf57c555110ede45

http://d.hatena.ne.jp/norio515/20111103/1320327712