player.html

<!DOCTYPE html>
<html>
<head>
    <style>
        #player, body, html { margin:0; padding:0; width:100%; height:100% }
        #top { padding-bottom:56.25%; height:0; overflow:hidden; position:relative }
        #wrapper { position:relative; padding-bottom:200%; transform:translateY(-35.95%) }
        #player { position:absolute; top:0; right:0; bottom:0; left:0; border:0 }
    </style>
</head>
<body>
<div id="top">
    <div id="wrapper">
        <iframe id="player" allow="autoplay; fullscreen" allowfullscreen></iframe>
    </div>
</div>
<script>
    const params = new URLSearchParams(window.location.hash.substr(1));
    const player = document.getElementById('player');
    player.setAttribute('src', `https://player.vimeo.com/video/${params.get('v')}?title=0&byline=0&portrait=0&transparent=0&autoplay=1&muted=1#t=${params.get('t')}`);
</script>
</body>
</html>