regex101: YouTube ID from URL parser

Non-Capturing Group(?:^|\W)

1st Alternative^

^start of line

2nd Alternative\W

\Wany non-word character

Non-Capturing Group(?:youtube(?:-nocookie)?\.com/(?:.*[?&]v=|v/|e(?:mbed)?/|[^/]+/.+/)|youtu\.be/)

1st Alternativeyoutube(?:-nocookie)?\.com/(?:.*[?&]v=|v/|e(?:mbed)?/|[^/]+/.+/)

youtubethe literal text youtube (case sensitive)

Non-Capturing Group(?:-nocookie)?

?repeats the group contents below at most once:

-nocookiethe literal text -nocookie (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

com/the literal text com/ (case sensitive)

Non-Capturing Group(?:.*[?&]v=|v/|e(?:mbed)?/|[^/]+/.+/)

1st Alternative.*[?&]v=

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

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

v=the literal text v= (case sensitive)

2nd Alternativev/

v/the literal text v/ (case sensitive)

3rd Alternativee(?:mbed)?/

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

Non-Capturing Group(?:mbed)?

?repeats the group contents below at most once:

mbedthe literal text mbed (case sensitive)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

4th Alternative[^/]+/.+/

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.+any character (except for line terminators), repeated at least once

/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativeyoutu\.be/

yoututhe literal text youtu (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

be/the literal text be/ (case sensitive)

Group 1([\w-]+)

Character Class[\w-]+

+matches at least one character from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

(?:^|\W)(?:youtube(?:-nocookie)?\.com/(?:.*[?&]v=|v/|e(?:mbed)?/|[^/]+/.+/)|youtu\.be/)([\w-]+)

New

youtube.com/watch?v=DFYRQ_zQ-gk
www.youtube.com/watch?v=DFYRQ_zQ-gk
https://youtube.com/watch?v=DFYRQ_zQ-gk
https://www.youtube.com/watch?v=DFYRQ_zQ-gk
https://www.youtube.com/watch?v=DFYRQ_zQ-gk&feature=feedrec_grec_index
https://www.youtube.com/watch?v=DFYRQ_zQ-gk#t=0m10s
https://www.youtube.com/?feature=player_embedded&v=DFYRQ_zQ-gk
https://www.youtube.com/watch?feature=player_embedded&v=DFYRQ_zQ-gk
https://www.youtube.com/UCucW7UIJh8FHbv2O0jW8skw?v=DFYRQ_zQ-gk#t=0m10s

https://www.youtube.com/v/DFYRQ_zQ-gk?fs=1&amp;hl=en_US&amp;rel=0
https://www.youtube.com/e/DFYRQ_zQ-gk?fs=1&amp;hl=en_US&amp;rel=0
https://www.youtube.com/embed/DFYRQ_zQ-gk?rel=0
https://www.youtube.com/user/UCucW7UIJh8FHbv2O0jW8skw#p/u/11/DFYRQ_zQ-gk?rel=0
https://www.youtube.com/UCucW7UIJh8FHbv2O0jW8skw#p/c/54B8C800269D7C1B/0/DFYRQ_zQ-gk?rel=0

m.youtube.com/watch?v=DFYRQ_zQ-gk
//m.youtube.com/watch?v=DFYRQ_zQ-gk
https://m.youtube.com/watch?v=DFYRQ_zQ-gk

youtu.be/DFYRQ_zQ-gk
https://youtu.be/DFYRQ_zQ-gk
https://youtu.be/DFYRQ_zQ-gk?t=2s
https://youtu.be/DFYRQ_zQ-gk?list=PLelYX5BVrtO0sWvnTSdvot21pjlKTNVeU

https://youtube-nocookie.com/watch?v=DFYRQ_zQ-gk?t=2s

<iframe width="480" height="270" src="https://www.youtube.com/embed/DFYRQ_zQ-gk?feature=oembed" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

in text youtube.com/watch?v=DFYRQ_zQ-gk in text

DFYRQ_zQ-gk
/watch?v=DFYRQ_zQ-gk
https://www.youtubee.com/watch?v=DFYRQ_zQ-gk
https://notyoutube.com/watch?v=DFYRQ_zQ-gk

Regular Expressions 101

Regular Expression

Substitution