rrthe literal text rr (case sensitive) \da digit
---sn-the literal text ---sn- (case sensitive) Character Class[a-z0-9]{8} {8}matches exactly 8 characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
-the literal - (4510 / 558 / 2D16)
\w{4}any word character, repeated exactly 4 times
\.the literal . (4610 / 568 / 2E16)
googlevideothe literal text googlevideo (case sensitive) \.the literal . (4610 / 568 / 2E16)
comthe literal text com (case sensitive) g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string