wwwthe literal text www (case sensitive) .any Unicode character (except for line terminators)
Group resource(?P<resource>facebook.com) facebookthe literal text facebook (case sensitive) .any Unicode character (except for line terminators)
comthe literal text com (case sensitive) .*?any Unicode character (except for line terminators), repeated any number of times
/videothe literal text /video (case sensitive) .any Unicode character (except for line terminators)
phpthe literal text php (case sensitive) \?the literal ? (6310 / 778 / 3F16)
.*?any Unicode character (except for line terminators), repeated any number of times
Non-Capturing Group(?:(?:videos%2F(vb\.[0-9]+%2F)?|v%3D)(?P<id>[0-9]+)) Non-Capturing Group(?:videos%2F(vb\.[0-9]+%2F)?|v%3D) 1st Alternativevideos%2F(vb\.[0-9]+%2F)? videos%2Fthe literal text videos%2F (case sensitive) ?repeats the group contents below at most once:
vbthe literal text vb (case sensitive) \.the literal . (4610 / 568 / 2E16)
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
%2Fthe literal text %2F (case sensitive) v%3Dthe literal text v%3D (case sensitive) +matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
.*any Unicode character (except for line terminators), repeated any number of times