src/renderer/component/video/internal/player.jsx

@@ -19,6 +19,7 @@ class VideoPlayer extends React.PureComponent {
     };
 
     this.togglePlayListener = this.togglePlay.bind(this);
+    this.toggleFullScreenVideo = this.toggleFullScreen.bind(this);
   }
 
   componentWillReceiveProps(nextProps) {
@@ -77,6 +78,7 @@ class VideoPlayer extends React.PureComponent {
         changeVolume(mediaElement.volume);
       });
       mediaElement.volume = volume;
+      mediaElement.addEventListener('dblclick', this.toggleFullScreenVideo);
     }
   }
 
@@ -112,6 +114,17 @@ class VideoPlayer extends React.PureComponent {
     this.props.doPause();
   }
 
+  toggleFullScreen(event) {
+    const mediaElement = this.media.children[0];
+    if (mediaElement) {
+      if (document.webkitIsFullScreen) {
+        document.webkitExitFullscreen();
+      } else {
+        mediaElement.webkitRequestFullScreen();
+      }
+    }
+  }
+
   togglePlay(event) {
     // ignore all events except click and spacebar keydown, or input events in a form control
     if (