[mirotalksfu] - fix init video object fit

public/views/Room.html

@@ -115,7 +115,7 @@ access to use this app.
                         autoplay=""
                         class="mirror"
                         poster="../images/loader.gif"
-                        style="object-fit: var(--videoObjFit)"
+                        style="object-fit: contain"
                     ></video>
                 </div>
                 <button id="initVideoButton" class="fas fa-video" onclick="handleVideo(event)"></button>