I've been using clive [1], cclive [2], and youtube-dl [3] to download youtube videos for many years.. none of these downloaded videos ever had ads.<p>[1] - <a href="http://clive.sourceforge.net/" rel="nofollow">http://clive.sourceforge.net/</a><p>[2] - <a href="http://cclive.sourceforge.net/" rel="nofollow">http://cclive.sourceforge.net/</a><p>[3] - <a href="http://rg3.github.io/youtube-dl/" rel="nofollow">http://rg3.github.io/youtube-dl/</a>