Don't use external youtube resources in test

Resolves https://github.com/openSUSE/osem/issues/1986

spec/spec_helper.rb

@@ -63,7 +63,12 @@ RSpec.configure do |config|
   Capybara.javascript_driver = :poltergeist
 
   Capybara.register_driver :poltergeist do |app|
-    Capybara::Poltergeist::Driver.new(app, phantomjs: Phantomjs.path, js_errors: false, window_size: [1920, 1080])
+    Capybara::Poltergeist::Driver.new(
+      app,
+      phantomjs:   Phantomjs.path,
+      js_errors:   false,
+      window_size: [1920, 1080]
+    )
   end
 
   # Includes helpers and connect them to specific types of tests