Add Video Hub App (electron#546)

* add Video Hub App

* must be https

Author: whyboris

apps/video-hub-app/video-hub-app-icon.png

@@ -0,0 +1,10 @@
+name: Video Hub App
+description: 'Browse, search, and preview your videos'
+website: 'http://videohubapp.com/'
+category: Photo & Video
+keywords:
+    - video
+    - videos
+    - catalog
+    - search
+    - file-manager

apps/video-hub-app/video-hub-app.yml

@@ -13,8 +13,8 @@ propose changes to this document in a pull request.
 ## Contents
 
 * [Adding your app](#adding-your-app)
-  + [Using the wizard 🔮](#using-the-wizard-%F0%9F%94%AE)
-  + [Adding your app by hand 💪](#adding-your-app-by-hand-%F0%9F%92%AA)
+  + [Using the wizard 🔮](#using-the-wizard-)
+  + [Adding your app by hand 💪](#adding-your-app-by-hand-)
   + [YML File Rules](#yml-file-rules)
   + [Categories](#categories)
   + [Screenshots](#screenshots)
@@ -107,7 +107,7 @@ apps
 
 ### Screenshots
 
-Screenshots are optional, but should be an array in the following format if provided:
+Screenshots are optional, but must be _https_ and should be an array in the following format if provided:
 
 ```yml
 screenshots: