Improved UI for download only mode

Updated API model for DatabaseFile

src/app/components/recent-videos/recent-videos.component.scss

@@ -109,4 +109,13 @@
     text-overflow: ellipsis;
     max-width: 70%;
     margin: 0 auto;
+}
+
+.blurred {
+    filter: blur(2px);
+}
+
+.downloading-spinner {
+    align-self: center;
+    position: absolute;
 }