Revert back file changes

Author: sanganinamrata

app/design/frontend/Magento/blank/Magento_ProductVideo/web/css/source/_module.less

@@ -91,8 +91,8 @@
 
 //  @TODO UI: check possibility to use .media-width() mixin
 @media only screen
-and (min-device-width: @screen__xxs)
-and (max-device-width: @screen__m)
+and (min-device-width: 320px)
+and (max-device-width: 780px)
 and (orientation: landscape) {
     .product-video {
         height: 100%;