youtube video id from url

Question

I have obtained these codes from other stackoverflow pages to correct youtube links but they dont work for my url:

https://www.youtube.com/watch?v=r2dRQHJ-aAk

code:

<script>
$('#videoURL').focusout(function() {
    var url = this.value;
    var videoid = url.match(/(?:https?:\/{2})?(?:w{3}\.)?youtu(?:be)?\.(?:com|be)(?:\/watch\?v=|\/)([^\s&]+)/);
    if(videoid != null) {
      $('#videoURL').value('http://www.youtube.com/watch?v='+videoid[1]);
    } else { 
        console.log("The youtube url is not valid.");
    }
});

</script>

it always returns:

The youtube url is not valid

the video id is always 11 characters long, and can only be `a-zA-Z0-9` `-` and `_`. Just search the given string for a collection of characters that match that. — Kevin B, Jul 26 '13 at 20:07
no it is not the same question, coz user is allowed to enter none youtube urls and code should recognize that. — sheno, Jul 26 '13 at 20:11
@hjpotter92 doesn't always work: http://jsfiddle.net/3JCHb/1/ — Kevin B, Jul 26 '13 at 20:12
@hjpotter92, where was the problem? it didnt work on my firefox browser — sheno, Jul 26 '13 at 20:14

score 4 · Answer 1 · answered Jul 26 '13 at 20:08

You don't need a regular expression for this:

var videoid = url.split('v=')[1];
var ampersandPosition = videoid.indexOf('&');
if(ampersandPosition != -1) {
    videoid = video_id.substring(0, ampersandPosition);
}

You can use it if you want however:

var regExp = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/;

score 0 · Answer 2 · answered Jul 26 '13 at 21:52

^(https?://(www\.)?)?youtube\.com/watch\?v=([0-9a-zA-Z\-]{11})$

Works for;

https://www.youtube.com/watch?v=r2dRQHJ-aAk
https://youtube.com/watch?v=r2dRQHJ-aAk
http://www.youtube.com/watch?v=r2dRQHJ-aAk
youtube.com/watch?v=r2dRQHJ-aAk

I'm unsure about other youtube url formats, but you should be able to extract it with subgroup 3.

score 0 · Answer 3 · answered Jul 27 '13 at 07:51

0

in fact I had done a mistake:

var url = this.value;

should change into:

var url = this.val();

thanks to @hjpotter92

answered Jul 27 '13 at 07:51

sheno

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youtube video id from url

3 Answers3