main.js

    thumbFromVideo: function(embed, quality) {
        console.log('thumb for video', embed);
        embed = embed.trim(); // who knows why
        var hash, u;
        if (embed.search(/https?:\/\/abc\.go\.com/) >= 0) {
            hash = embed.match(/https?:\/\/abc\.go\.com\/embed\/([^\/\?"]*)/).pop();
            return 'http://static.east.abc.go.com/service/image/ratio/id/' + hash + '/dim/160.1x1.jpg';
        } else if (embed.indexOf('<') >= 0) {
            hash = $(embed).attr('src').match(/embed\/(.*)$/)[1];
        } else if (embed.search(/^https?:\/\/(www\.)?youtube.com/) >= 0) {
            u = new URL(embed);
            hash = u.search.substr(1).split('&').filter(
                function(ob) { return (ob.search(/^v=/) == 0); })[0].substr(2);
        } else {
            hash = embed.split('/')[3]; // http://youtu.be/7gConQtn_5A
        }
        return "http://img.youtube.com/vi/" + hash + "/" + quality + "default.jpg";
    },