play.html

<!DOCTYPE html>
<html>
    <script src="http://cdn.dashjs.org/latest/dash.all.min.js"></script>
    <style>
        video {
            width: 640px;
            height: 360px;
        }
    </style>
    <body>
        <div>
            <video data-dashjs-player autoplay id="video1" src="https://dash.akamaized.net/akamai/bbb_30fps/bbb_30fps.mpd" controls></video>
        </div>
    </body>
    
    <script>
        var params = window.location.search.slice(1).split("&");
        for(var p=0; p<params.length; p++) {
            var nv = params[p].split("=");
            var name = nv[0], value = nv[1];
            
            document.getElementById("video1").src = value;
            // What you want to do with name and value...
        }
    </script>
</html>