yId('videoBufferDelay');
    var $replay = document.getElementById('replay');
    var $demuxUseWorker = document.getElementById('demuxUseWorker');
    var $mseDecoderUseWorker = document.getElementById('mseDecoderUseWorker');
    var $isDebug = document.getElementById('isDebug');
    var $isFlv = document.getElementById('isFlv');
    var $useSIMDMThreading = document.getElementById('useSIMDMThreading');

    var showOperateBtns = true; // 是否显示按钮
    var forceNoOffscreen = true; //
    var playLi