Users can only edit the video that they uploaded
Only users can add tags, users can only remove tags that they have added
Fixed tag editing and updating for videos to match books behavior
Fixed missing commas bug and ensured users create videos and books from the controller and not the form
Merge conflict
Merge branch 'jjlangholtz-video-permissions'
Fixed some translation bugs in preferences modal
Merge remote-tracking branch 'upstream/master'

Conflicts:
	app/views/books/_edit_tags_form.html.slim