Please make sure you have Allowed/turned on permission to use facebook for this app in Setting->Facebook. Please let me know.
One alternative solution is, deleting facebook account from your Setting and try the app. This will definitely work. It will popup for permissions.
Watch all the videos from facebook at once!
videos are categorised in the following parts
-My Videos
-Friends Videos
-Page Videos
-Tag Videos
Hope you will enjoy this free app and watch facebook videos directly in your iPhone/iPad