I have rectified the other issue you had about the showcase section appearing twice. About th e video, I have set the video to full width but the video doesn’t appear. So I found that the reason is a conflict between the Revolution Slider and fitvids JQuery plugin. Now you will have to edit the main.js file inside the js folder go to line 622 and delete the below code from it.
That should do the trick. Let me know whether it helped. Thanks!