diff --git a/web/src/sass/_common.sass b/web/src/sass/_common.sass
index 2c27fbae..0158b4c0 100755
--- a/web/src/sass/_common.sass
+++ b/web/src/sass/_common.sass
@@ -2664,15 +2664,11 @@ a.grey-link
     margin-bottom: 30px
     color: #191919
   &__video_frame
-    width: 640px
-    height: 360px
-    +m
-      width: 100%
+    width: 100%
+    height: 400px
   &__chat_frame
-    width: 600px
+    width: 100%
     height: 600px
-    +m
-      width: 100%
 
 
 .lessons