Regular Expressions 101

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/
[\w\W]*vimeo\.com\/([\w\W]*)[\w\W]*
/
gsi
Match a single character present in the list below
[\w\W]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\w matches any word character (equivalent to [a-zA-Z0-9_])
\W matches any non-word character (equivalent to [^a-zA-Z0-9_])
vimeo
matches the characters vimeo literally (case insensitive)
\. matches the character . with index 4610 (2E16 or 568) literally (case insensitive)
com
matches the characters com literally (case insensitive)
\/ matches the character / with index 4710 (2F16 or 578) literally (case insensitive)
1st Capturing Group
([\w\W]*)
Match a single character present in the list below
[\w\W]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\w matches any word character (equivalent to [a-zA-Z0-9_])
\W matches any non-word character (equivalent to [^a-zA-Z0-9_])
Match a single character present in the list below
[\w\W]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\w matches any word character (equivalent to [a-zA-Z0-9_])
\W matches any non-word character (equivalent to [^a-zA-Z0-9_])
Global pattern flags
g modifier: global. All matches (don't return after first match)
s modifier: single line. Dot matches newline characters
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gsi

Test String