Fix fullscreen video player (fixes #7244) (#7245)

app/javascript/styles/mastodon/components.scss

@@ -4446,6 +4446,8 @@ a.status-card {
     video {
       max-width: 100% !important;
       max-height: 100% !important;
+      width: 100% !important;
+      height: 100% !important;
     }
   }