^https?:\/\/(?:www\.)?vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/([^\/]*)\/videos\/|album\/(\d+)\/video\/|)(\d+)(?:$|\/|\?)$
(from http://stackoverflow.com/a/26445466/903505)
(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+(?:&|&);v=))((?:\w|-|_){11})(?:(?:\?|&|&)index=((?:\d){1,3}))?(?:(?:\?|&|&)list=((?:\w|-|_){24}))?(?:\S+)?