Regular Expressions 101

^start of line

Group 1(https?://www\.facebook\.com/(?:video\.php\?v=\d+|.*?/videos/\d+))

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://wwwthe literal text ://www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

facebookthe literal text facebook (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

com/the literal text com/ (case sensitive)

Non-Capturing Group(?:video\.php\?v=\d+|.*?/videos/\d+)

1st Alternativevideo\.php\?v=\d+

videothe literal text video (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

v=the literal text v= (case sensitive)

\d+a digit, repeated at least once

2nd Alternative.*?/videos/\d+

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

/videos/the literal text /videos/ (case sensitive)

\d+a digit, repeated at least once

$end of line

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(https?://www\.facebook\.com/(?:video\.php\?v=\d+|.*?/videos/\d+))$

New

https://www.facebook.com/video.php?v=100000000000000
https://www.facebook.com/username1/videos/100000000000000
https://www.facebook.com/username2/videos/100000000000000

Regular Expression

Extraction