      <button onclick="switch_mds()">Switch to MediaDataSource</button>
                </div>
                <div class="options">
                    <input type="checkbox" id="isLive" onchange="saveSettings()" />
                    <label for="isLive">isLive</label>
                    <input type="checkbox" id="withCredentials" onchange="saveSettings()" />
                    <label for="withCredentials">withCredentials</label>
                    <input type="checkbox" id="hasAudio" onchange="saveSet