tokens: Initially when page is loaded video is displayed but when user clicks on the " Contact Us " link the video should get hidden and contact-us input form should be displayed in its place .
ner_tags: O O O O O B-User_Interface_Element O O O O O O O O O O O O B-User_Interface_Element O B-User_Interface_Element O O O O O O B-User_Interface_Element O O O O O O O