?repeats the group contents below at most once:
httpthe literal text http (case sensitive) httpsthe literal text https (case sensitive) :the literal : (5810 / 728 / 3A16)
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
?repeats the group contents below at most once:
wwwthe literal text www (case sensitive) \.the literal . (4610 / 568 / 2E16)
vimeothe literal text vimeo (case sensitive) .any Unicode character (except for line terminators)
comthe literal text com (case sensitive) \/the literal / (4710 / 578 / 2F16)
Non-Capturing Group(?:channels\/(?:\w+\/)?|groups\/([^\/]*)\/videos\/|) 1st Alternativechannels\/(?:\w+\/)? channelsthe literal text channels (case sensitive) \/the literal / (4710 / 578 / 2F16)
Non-Capturing Group(?:\w+\/)? ?repeats the group contents below at most once:
\w+a Unicode word character, repeated at least once
\/the literal / (4710 / 578 / 2F16)
2nd Alternativegroups\/([^\/]*)\/videos\/ groupsthe literal text groups (case sensitive) \/the literal / (4710 / 578 / 2F16)
Negated Character Class[^\/]* *matches any number of characters outside the set below:
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
videosthe literal text videos (case sensitive) \/the literal / (4710 / 578 / 2F16)
3rd Alternative — matches an empty string
\d+a Unicode decimal digit, repeated at least once
Non-Capturing Group(?:|\/\?) 1st Alternative — matches an empty string
\/the literal / (4710 / 578 / 2F16)
\?the literal ? (6310 / 778 / 3F16)
g modifier: global. Finds all matches instead of stopping after the first