我做了一个小函数，从Youtube url中提取视频id，如下所示。

var videoId =函数(url) { Var match = url.match(/v=([0-9a-z_-]{1,20})/i); 返回(match ?匹配['1']:false); }; console.log (videoId (' https://www.youtube.com/watch?v=dQw4w9WgXcQ ')); console.log (videoId (' https://www.youtube.com/watch?t=17s&v=dQw4w9WgXcQ ')); console.log (videoId (' https://www.youtube.com/watch?v=dQw4w9WgXcQ&t=17s '));

这个函数将提取视频id，即使url中有多个参数。

我喜欢Surya的回答。只是一个行不通的案例……

String regExp = "/.*(?:youtu.be\\/|v\\/|u/\\w/|embed\\/|watch\\?.*&?v=)";

并不适用于

youtu.be/i4fjHzCXg6c  and  www.youtu.be/i4fjHzCXg6c

升级版:

String regExp = "/?.*(?:youtu.be\\/|v\\/|u/\\w/|embed\\/|watch\\?.*&?v=)";

适用于所有人。

Java代码:(适用于所有url:

http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index http://www.youtube.com/user/IngridMichaelsonVEVO#p/a/u/1/QdK8U-VIH_o http://youtube.googleapis.com/v/0zM3nApSvMg?fs=1&hl=en_US&rel=0 http://www.youtube.com/watch?v=0zM3nApSvMg#t=0m10s http://www.youtube.com/embed/0zM3nApSvMg?rel=0” http://www.youtube.com/watch?v=0zM3nApSvMg http://youtu.be/0zM3nApSvMg http://www.youtube.com/watch?v=0zM3nApSvMg/ http://www.youtube.com/watch?feature=player_detailpage&v=8UVNT4wvIGY

)

    String url = "http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index";

    String regExp = "/.*(?:youtu.be\\/|v\\/|u/\\w/|embed\\/|watch\\?.*&?v=)";
    Pattern compiledPattern = Pattern.compile(regExp);
    Matcher matcher = compiledPattern.matcher(url);
    if(matcher.find()){
        int start = matcher.end();
        System.out.println("ID : " + url.substring(start, start+11));

    }

DailyMotion网站:

String url = "http://www.dailymotion.com/video/x4xvnz_the-funny-crash-compilation_fun";

    String regExp = "/video/([^_]+)/?";
    Pattern compiledPattern = Pattern.compile(regExp);
    Matcher matcher = compiledPattern.matcher(url);
    if(matcher.find()){
        String match = matcher.group();
        System.out.println("ID : " + match.substring(match.lastIndexOf("/")+1));

    }

这可以从任何类型的youtube链接获得视频id

var url= 'http://youtu.be/0zM3nApSvMg';
var urlsplit= url.split(/^.*(youtu.be\/|v\/|embed\/|watch\?|youtube.com\/user\/[^#]*#([^\/]*?\/)*)\??v?=?([^#\&\?]*).*/);
console.log(urlsplit[3]);

function youtube_parser(url){
    var match = url.match(/^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/);
    return (match&&match[7].length==11)?match[7]:false;
}

最短高效

稍微严格一点的版本:

^https?://(?:www\.)?youtu(?:\.be|be\.com)/(?:\S+/)?(?:[^\s/]*(?:\?|&)vi?=)?([^#?&]+)

测试:

http://www.youtube.com/user/dreamtheater#p/u/1/oTJRivZTMLs
https://youtu.be/oTJRivZTMLs?list=PLToa5JuFMsXTNkrLJbRlB--76IAOjRM9b
http://www.youtube.com/watch?v=oTJRivZTMLs&feature=youtu.be
https://youtu.be/oTJRivZTMLs
http://youtu.be/oTJRivZTMLs&feature=channel
http://www.youtube.com/ytscreeningroom?v=oTJRivZTMLs
http://www.youtube.com/embed/oTJRivZTMLs?rel=0
http://youtube.com/v/oTJRivZTMLs&feature=channel
http://youtube.com/v/oTJRivZTMLs&feature=channel
http://youtube.com/vi/oTJRivZTMLs&feature=channel
http://youtube.com/?v=oTJRivZTMLs&feature=channel
http://youtube.com/?feature=channel&v=oTJRivZTMLs
http://youtube.com/?vi=oTJRivZTMLs&feature=channel
http://youtube.com/watch?v=oTJRivZTMLs&feature=channel
http://youtube.com/watch?vi=oTJRivZTMLs&feature=channel