diff --git a/app/assets/javascripts/osem.js b/app/assets/javascripts/osem.js
index 989b00db..19700d67 100644
--- a/app/assets/javascripts/osem.js
+++ b/app/assets/javascripts/osem.js
@@ -1,7 +1,7 @@
 $(function() {
     $("#event_video_type").change(function () {
         $(".media-type").hide();
-        $('#' + $(this).val() + '-help').show();
+        $('#' + $(this).val().toLowerCase() + '-help').show();
     });
 
     $('.dropdown-toggle').dropdown();
diff --git a/app/models/event.rb b/app/models/event.rb
index 9abc4521..48db7b98 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -3,6 +3,10 @@ class Event < ActiveRecord::Base
   has_paper_trail
   attr_accessible :title, :subtitle, :abstract, :description, :event_type_id, :people_attributes, :person, :proposal_additional_speakers, :track_id, :video_id, :video_type, :require_registration, :difficulty_level_id
 
+  VIDEO_TYPE = [YOUTUBE = 'YouTube', SLIDE_SHARE = 'SlideShare']
+
+  validates :video_type, inclusion: {in: VIDEO_TYPE}
+
   acts_as_commentable
 
   has_many :event_people, :dependent => :destroy
diff --git a/app/views/proposal/_proposal_form.html.haml b/app/views/proposal/_proposal_form.html.haml
index 6e6379cb..bbfcf713 100644
--- a/app/views/proposal/_proposal_form.html.haml
+++ b/app/views/proposal/_proposal_form.html.haml
@@ -31,9 +31,9 @@
     %br
     %br
     = f.input :description, :input_html => {:rows => 5, :class=> "span11"}, :hint => "This will only be shown to organizers, not to attendees."
-    = f.input :video_type, :as => :select, :label => "Media Type", :collection => [['YoubTube', 'youtube'], ['SlideShare', 'slideshare']], :include_blank => false
-    %p{:class => "help-block media-type", :id => "youtube-help"} Go to your youtube video, click on "share" and copy everything behind http://youtu.be/"
-    %p{:class => "help-block media-type", :id => "slideshare-help", :style => "display:none"} Go to your slideshare, click on "share" -> "embed" and copy the id
+    = f.input :video_type, :as => :select, :label => "Media Type", :collection => Event::VIDEO_TYPE, :include_blank => false
+    %p{:class => "help-block media-type", :id => "youtube-help"} Go to your YouTube video, click on "share" and copy everything behind http://youtu.be/"
+    %p{:class => "help-block media-type", :id => "slideshare-help", :style => "display:none"} Go to your SlideShare, click on "share" -> "embed" and copy the id
     = f.input :video_id, :label => "Media ID", :as => :string
 
   %section#information
diff --git a/app/views/proposal/show.html.haml b/app/views/proposal/show.html.haml
index 2d91454f..cc3f9d4f 100644
--- a/app/views/proposal/show.html.haml
+++ b/app/views/proposal/show.html.haml
@@ -31,9 +31,9 @@
     .row-fluid
       .span12.flexvideo
         -if @event.video_id
-          -if @event.video_type == "youtube"
+          -if @event.video_type == Event::YOUTUBE
             %iframe{:width=>"560", :height=>"315", :frameborder=>"0", :allowfullscreen=>"true", :src=> request.ssl? ? "https://" : "http://" + "www.youtube.com/embed/#{@event.video_id}?rel=0"}
-          -if @event.video_type == "slideshare"
+          -if @event.video_type == Event::SLIDE_SHARE
             %iframe{:width=>"560", :height=>"315", :frameborder=>"0", :allowfullscreen=>"true", :src=> request.ssl? ? "https://" : "http://" + "www.slideshare.net/slideshow/embed_code/#{@event.video_id}"}
         -else
           %iframe{:width=>"560", :height=>"315", :frameborder=>"0", :allowfullscreen=>"true", :src=>request.ssl? ? "https://" : "http://" + "www.youtube.com/embed/Eiv4e5ZxTmg?rel=0"}