regex101: YouTube Video ID + URL validator

Non-Capturing Group(?:[hH][tT]{2}[pP][sS]{0,1}:\/\/)?

?repeats the group contents below at most once:

Character Class[hH]

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

Hthe literal H (72₁₀ / 110₈ / 48₁₆) (case sensitive)

Character Class[tT]{2}

{2}matches exactly 2 characters from the set below:

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

Character Class[pP]

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Character Class[sS]{0,1}

{0,1}matches at most one character from the set below:

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[wW]{0,3}

{0,3}matches between 0 and 3 characters from the set below:

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive)

Wthe literal W (87₁₀ / 127₈ / 57₁₆) (case sensitive)

\.{0,1}optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[yY]

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

Ythe literal Y (89₁₀ / 131₈ / 59₁₆) (case sensitive)

Character Class[oO]

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

Character Class[uU]

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

Uthe literal U (85₁₀ / 125₈ / 55₁₆) (case sensitive)

Character Class[tT]

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

Character Class[uU]

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

Uthe literal U (85₁₀ / 125₈ / 55₁₆) (case sensitive)

Non-Capturing Group(?:\.[bB][eE]|[bB][eE]\.[cC][oO][mM])?

?repeats the group contents below at most once:

1st Alternative\.[bB][eE]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[bB]

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Character Class[eE]

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

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

2nd Alternative[bB][eE]\.[cC][oO][mM]

Character Class[bB]

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Character Class[eE]

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

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[cC]

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

Character Class[oO]

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

Character Class[mM]

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:(?:[wW][aA][tT][cC][hH])?(?:\/)?\?(?:.*)?[vV]=([a-zA-Z0-9--]+).*|([A-Za-z0-9--]+))

1st Alternative(?:[wW][aA][tT][cC][hH])?(?:\/)?\?(?:.*)?[vV]=([a-zA-Z0-9--]+).*

Non-Capturing Group(?:[wW][aA][tT][cC][hH])?

?repeats the group contents below at most once:

Character Class[wW]

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive)

Wthe literal W (87₁₀ / 127₈ / 57₁₆) (case sensitive)

Character Class[aA]

Character Class[tT]

Character Class[cC]

Character Class[hH]

Non-Capturing Group(?:\/)?

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Non-Capturing Group(?:.*)?

Character Class[vV]

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Group 1([a-zA-Z0-9--]+)

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

2nd Alternative([A-Za-z0-9--]+)

Global pattern flags

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

Search reference

Regular Expression

(?:[hH][tT]{2}[pP][sS]{0,1}:\/\/)?[wW]{0,3}\.{0,1}[yY][oO][uU][tT][uU](?:\.[bB][eE]|[bB][eE]\.[cC][oO][mM])?\/(?:(?:[wW][aA][tT][cC][hH])?(?:\/)?\?(?:.*)?[vV]=([a-zA-Z0-9--]+).*|([A-Za-z0-9--]+))

Test String
New

www.youtube.com/watch?v=fjgfjgk

Regular Expression

Test StringNew

Test String
New