A few updates

ekko-lightbox.coffee

@@ -60,7 +60,7 @@ EkkoLightbox = ( element, options ) ->
 			$(document).on 'keydown.ekkoLightbox', @navigate.bind(@)
 
 			# add the directional arrows to the modal
-			if @options.directional_arrows
+			if @options.directional_arrows && @gallery_items.length > 1
 				@lightbox_container.prepend('<div class="ekko-lightbox-nav-overlay"><a href="#" class="'+@strip_stops(@options.left_arrow_class)+'"></a><a href="#" class="'+@strip_stops(@options.right_arrow_class)+'"></a></div>')
 				@modal_arrows = @lightbox_container.find('div.ekko-lightbox-nav-overlay').first()
 				@lightbox_container.find('a'+@strip_spaces(@options.left_arrow_class)).on 'click', (event) =>
@@ -130,37 +130,41 @@ EkkoLightbox.prototype = {
 				do @navigate_left
 
 	navigate_left: ->
-
+
+		if @gallery_items.length == 1 then return
+
 		if @gallery_index == 0 then @gallery_index = @gallery_items.length-1 else @gallery_index-- #circular
 
 		@$element = $(@gallery_items.get(@gallery_index))
 		@updateTitleAndFooter()
 		src = @$element.attr('data-remote') || @$element.attr('href')
 
-		@detectRemoteType(src)
+		@detectRemoteType(src, @$element.attr('data-type'))
 
 	navigate_right: ->
-
+
+		if @gallery_items.length == 1 then return
+
 		if @gallery_index == @gallery_items.length-1 then @gallery_index = 0 else @gallery_index++ #circular
 
 		@$element = $(@gallery_items.get(@gallery_index))
 		src = @$element.attr('data-remote') || @$element.attr('href')
 		@updateTitleAndFooter()
 
-		@detectRemoteType(src)
+		@detectRemoteType(src, @$element.attr('data-type'))
 
 		if @gallery_index + 1 < @gallery_items.length
 			next = $(@gallery_items.get(@gallery_index + 1), false)
 			src = next.attr('data-remote') || next.attr('href')
-			if @isImage(src)
+			if next.attr('data-type') == 'image' || @isImage(src)
 				@preloadImage(src, false)
 
-	detectRemoteType: (src) ->
-		if @isImage(src)
+	detectRemoteType: (src, type) ->
+		if type == 'image' || @isImage(src)
 			@preloadImage(src, true)
-		else if video_id = @getYoutubeId(src)
+		else if type == 'youtube' || video_id = @getYoutubeId(src)
 			@showYoutubeVideo(video_id)
-		else if video_id = @getVimeoId(src)
+		else if type == 'vimeo' || video_id = @getVimeoId(src)
 			@showVimeoVideo(video_id)
 		else
 			@error "Could not detect remote target type. Force the type using data-type=\"image|youtube|vimeo\""