learningequality/ka-lite — pull request #1283 by aronasorman (2013-12-13 21:39:29+00:00)
Title: fix issue #1251: remove calls to sudo in scrape_videos

Solves #1251. Basically, store the path of `youtube-dl` whether it's installed globally, or we install it ourselves. Then use this path whenever we're gonna download videos.