gilbitron/Nivo-Lightbox — pull request #36 by easingthemes (2014-09-01 10:55:31+00:00)
Title: Added 'youtube-nocookie' domain

Youtube has one more domain - 'youtube-nocookie.com'
eg: https://www.youtube-nocookie.com/embed/R1J1Q4uqnC4
Since it's already 'embed', 'src = href;' is enough, no need for patterns.