Regular Expressions 101

Explanation
Pro

Positive Lookbehind(?<=videos\/|v=|youtu\.be\/)

1st Alternativevideos\/

videosthe literal text videos (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativev=

v=the literal text v= (case sensitive)

3rd Alternativeyoutu\.be\/

yoututhe literal text youtu (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

bethe literal text be (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?<=videos\/|v=|youtu\.be\/)([\w-]+)

New

https://www.youtube.com/watch?v=q07SQFmL4rM
https://www.youtube.com/watch?v=q07SQFmL4yM
https://youtu.be/qT47KF5pvfw
https://youtu.be/zImHyTyYhM8?t=4s
https://www.youtube.com/watch?time_continue=4&v=zImHyTyYhM8