ment.getElementById('useWCS');
    var $videoBuffer = document.getElementById('videoBuffer');
    var $videoBufferDelay = document.getElementById('videoBufferDelay');
    var $replay = document.getElementById('replay');
    var $fps = document.querySelector('.fps-inner');
    var $renderDom = document.getElementById('renderDom');
    var $isUseWebGPU = document.getElementById('isUseWebGPU');
    var $isEmitSEI = document.getElementById('isEmitSEI');
    var $videoSEISyncPts = document.getElementById('videoS