Add the new css file

res/css/views/voip/_VideoFeed.scss

@@ -0,0 +1,43 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_VideoFeed video {
+    width: 100%;
+}
+
+.mx_VideoFeed_remote {
+    width: 100%;
+    background-color: #000;
+    z-index: 50;
+}
+
+.mx_VideoFeed_local {
+    width: 25%;
+    height: 25%;
+    position: absolute;
+    left: 10px;
+    bottom: 10px;
+    z-index: 100;
+}
+
+.mx_VideoFeed_local video {
+    width: auto;
+    height: 100%;
+}
+
+.mx_VideoFeed_mirror video {
+    transform: scale(-1, 1);
+}