Youtube I.D Parsing for New Url Formats

How do I get the YouTube video ID from a URL?

You don't need to use a regular expression for this.

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

Get youtube id for all url types

Your regex appears to solve the problem as it stands now? I didn't try it in php, but it appears to work fine in my editor.

The first part of the regex http://(?:www\.)?youtu\.?be(?:\.com)?/matches http://youtu.be/ and the second part (embed/|watch\?v=|\?v=|v/|e/|.+/|watch.*v=|) ends with |) which means it matches nothing (making it optional). In other words it would trim away http://youtu.be/ leaving only the id.

A more intuitive way of writing it would be to make the whole if grouping optional I suppose, but as far as I can tell your regex is already solving your problem:

 #http://(?:www\.)?youtu\.?be(?:\.com)?/(embed/|watch\?v=|\?v=|v/|e/|.+/|watch.*v=)?#i

Note: Your regex would work with the www.youtu.be.com domain as well. It would be stripped away, but something to watch out for if you use this for validating input.

Update:

If you want to only match urls inside [youtube][/youtube] tags you could use look arounds.
Something along the lines of:

(?<=\[youtube\])(?:http://(?:www\.)?youtu\.?be(?:\.com)?/(?:embed/|watch\?v=|\?v=|v/|e/|[^\[]+/|watch.*v=)?)(?=.+\[/youtube\])

You could further refine it by making the .+ in the look ahead only match valid URL characters etc.

How to parse the video ID from new YouTube URLs

^(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+&v=|attribution_link\?a=.+?watch.+?v(?:%|=)))((\w|-){11})(?:\S+)?$

Try this.Added attribution_link\?a= for the newer urls.See demo.

http://regex101.com/r/yZ7qJ6/5

Parsing Youtube URLs

You regex is not correct.

The correct regex would be like this:

var re = /(?:https?:\/\/)?(?:youtu\.be\/|(?:www\.)?youtube\.com\/watch(?:\.php)?\?[^ ]*v=)([a-zA-Z0-9\-_]+)/g;
var str = 'https://www.youtube.com/watch?v=OovKTBO4aQs jiberish https://www.youtube.com/watch?v=DOQsYk8cbnE  jiberish a https://www.youtube.com/watch?v=97aiSGxmizg'console.log(str.match(re))

How can I extract video ID from YouTube's link in Python?

Python has a library for parsing URLs.

import urlparse
url_data = urlparse.urlparse("http://www.youtube.com/watch?v=z_AbfPXTKms&NR=1")
query = urlparse.parse_qs(url_data.query)
video = query["v"][0]

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