rg3/youtube-dl — pull request #1779 by yan12125 (2013-11-16 16:18:00+00:00)
Title: Try to use sogou proxy if youku videos are blocked

The core algorithm is from xiaoxia@xiaoxia.org. Use with the permission from XiaoXia. See the comments at 2013/08/18 in http://xiaoxia.org/2011/11/14/update-sogou-proxy-program-with-https-support/