youtube & vimeo thumbnail getter

function processURL(url, success){
    var id;

    if (url.indexOf('youtube.com') > -1) {
        id = url.split('/')[1].split('v=')[1].split('&')[0];
        return processYouTube(id);
    } else if (url.indexOf('youtu.be') > -1) {
        id = url.split('/')[1];
        return processYouTube(id);
    } else if (url.indexOf('vimeo.com') > -1) {
        if (url.match(/^vimeo.com\/[0-9]+/)) {
            id = url.split('/')[1];
        } else if (url.match(/^vimeo.com\/channels\/[\d\w]+#[0-9]+/)) {
            id = url.split('#')[1];
        } else if (url.match(/vimeo.com\/groups\/[\d\w]+\/videos\/[0-9]+/)) {
            id = url.split('/')[4];
        } else {
            throw new Error('Unsupported Vimeo URL');
        }

        $.ajax({
            url: 'http://vimeo.com/api/v2/video/' + id + '.json',
            dataType: 'jsonp',
            success: function(data) {
                sucess(data[0].thumbnail_large);
            }
        });
    } else {
        throw new Error('Unrecognised URL');
    }

    function processYouTube(id) {
        if (!id) {
            throw new Error('Unsupported YouTube URL');
        }

        sucess('http://i2.ytimg.com/vi/' + id + '/hqdefault.jpg');
    }
}