2015年5月更新：

该解决方案无法正常运行，YouTube API v2正在进行中，即将停用。

有关更多信息，请访问：https

//www.youtube.com/devicesupport

尝试这样的事情：

var video_id='VA770wpLX-Q';

$.getJSON('http://gdata.youtube.com/feeds/api/videos/'+video_id+'?v=2&alt=jsonc',function(data,status,xhr){
    alert(data.data.title);
    // data contains the JSON-Object below
});

演示：http：//jsfiddle.net/wqwxg/

返回的JSON如下所示：

{
    "apiVersion": "2.1",
    "data": {
        "id": "VA770wpLX-Q",
        "uploaded": "2011-02-24T22:31:02.000Z",
        "updated": "2012-04-08T21:37:06.000Z",
        "uploader": "drdrevevo",
        "category": "Music",
        "title": "Dr. Dre - I Need A Doctor (Explicit) ft. Eminem, Skylar Grey",
        "description": "Music video by Dr. Dre performing I Need A Doctor featuring Eminem and Skylar Grey (Explicit). © 2011 Aftermath Records",
        "tags": ["Dr", "Dre", "Eminem", "New", "Song", "Skylar", "Grey", "GRAMMYs", "Dr.", "Need", "Doctor", "video", "Eazy", "N.W.A.", "NWA", "easy", "drdre", "and", "em"],
        "thumbnail": {
            "sqDefault": "http://i.ytimg.com/vi/VA770wpLX-Q/default.jpg",
            "hqDefault": "http://i.ytimg.com/vi/VA770wpLX-Q/hqdefault.jpg"
        },
        "player": {
            "default": "http://www.youtube.com/watch?v=VA770wpLX-Q&feature=youtube_gdata_player"
        },
        "content": {
            "5": "http://www.youtube.com/v/VA770wpLX-Q?version=3&f=videos&app=youtube_gdata"
        },
        "duration": 457,
        "aspectRatio": "widescreen",
        "rating": 4.902695,
        "likeCount": "430519",
        "ratingCount": 441253,
        "viewCount": 88270796,
        "favoriteCount": 306556,
        "commentCount": 270597,
        "status": {
            "value": "restricted",
            "reason": "requesterRegion"
        },
        "restrictions": [{
            "type": "country",
            "relationship": "deny",
            "countries": "DE"
        }],
        "accessControl": {
            "comment": "allowed",
            "commentVote": "allowed",
            "videoRespond": "allowed",
            "rate": "allowed",
            "embed": "allowed",
            "list": "allowed",
            "autoPlay": "denied",
            "syndicate": "allowed"
        }
    }
}