<a href="httpthe literal text <a href="http (case sensitive) .?optionally matches any character (except for line terminators)
:the literal : (5810 / 728 / 3A16)
.*any character (except for line terminators), repeated any number of times
Group 1(youtube.com|.*be\/|.*embed\/|watch?. v=|(\w{11})) 1st Alternativeyoutube.com youtubethe literal text youtube (case sensitive) .any character (except for line terminators)
comthe literal text com (case sensitive) .*any character (except for line terminators), repeated any number of times
bethe literal text be (case sensitive) \/the literal / (4710 / 578 / 2F16)
.*any character (except for line terminators), repeated any number of times
embedthe literal text embed (case sensitive) \/the literal / (4710 / 578 / 2F16)
4th Alternativewatch?. v= watcthe literal text watc (case sensitive) h?optionally matches the literal h (10410 / 1508 / 6816) (case sensitive)
.any character (except for line terminators)
v=the literal text v= (case sensitive) \w{11}any word character, repeated exactly 11 times
.?optionally matches any character (except for line terminators)
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
a>the literal text a> (case sensitive) g modifier: global. Finds all matches instead of stopping after the first