Add load_and_authorize_resource to videos controller

app/controllers/admin/poll/questions/answers/videos_controller.rb

@@ -1,6 +1,6 @@
 class Admin::Poll::Questions::Answers::VideosController < Admin::Poll::BaseController
-  load_resource :answer, class: "::Poll::Question::Answer"
-  load_resource class: "::Poll::Question::Answer::Video", through: :answer
+  load_and_authorize_resource :answer, class: "::Poll::Question::Answer"
+  load_and_authorize_resource class: "::Poll::Question::Answer::Video", through: :answer
 
   def index
   end

app/models/abilities/administrator.rb

@@ -91,6 +91,7 @@ module Abilities
       can [:read, :create, :update], Poll::Question
       can :destroy, Poll::Question
       can :manage, Poll::Question::Answer
+      can :manage, Poll::Question::Answer::Video
 
       can :manage, SiteCustomization::Page
       can :manage, SiteCustomization::Image

spec/models/abilities/administrator_spec.rb

@@ -116,6 +116,8 @@ describe Abilities::Administrator do
 
   it { should be_able_to(:manage, Poll::Question::Answer) }
 
+  it { should be_able_to(:manage, Poll::Question::Answer::Video) }
+
   it { is_expected.to be_able_to :manage, Dashboard::AdministratorTask }
   it { is_expected.to be_able_to :manage, dashboard_administrator_task }