Regular Expressions 101

Explanation
Pro

Group 1(youtube\.com|youtu\.be|youtube-nocookie\.com)

1st Alternativeyoutube\.com

youtubethe literal text youtube (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case insensitive)

2nd Alternativeyoutu\.be

yoututhe literal text youtu (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

bethe literal text be (case insensitive)

3rd Alternativeyoutube-nocookie\.com

youtube-nocookiethe literal text youtube-nocookie (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:embed\/|v\/|watch\?v=|watch\?list=(.*)&v=)?

?repeats the group contents below at most once:

1st Alternativeembed\/

embedthe literal text embed (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativev\/

vthe literal v (118₁₀ / 166₈ / 76₁₆) (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

3rd Alternativewatch\?v=

watchthe literal text watch (case insensitive)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

v=the literal text v= (case insensitive)

4th Alternativewatch\?list=(.*)&v=

watchthe literal text watch (case insensitive)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

list=the literal text list= (case insensitive)

Group 2(.*)

.*any character (except for line terminators), repeated any number of times

&v=the literal text &v= (case insensitive)

Group 3((\w|-){11})

Group 4(\w|-){11}

{11}repeats the group contents below exactly 11 times:

1st Alternative\w

\wany word character

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 5(&list=(\w+)&?)?

?repeats the group contents below at most once:

&list=the literal text &list= (case insensitive)

Group 6(\w+)

\w+any word character, repeated at least once

&?optionally matches the literal & (38₁₀ / 46₈ / 26₁₆)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Unit Test Summary

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Quick Reference

25 tokens

Regular Expression

(youtube\.com|youtu\.be|youtube-nocookie\.com)\/(?:embed\/|v\/|watch\?v=|watch\?list=(.*)&v=)?((\w|-){11})(&list=(\w+)&?)?

Unit Tests

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