Shopify Website design Customization - 2

We are currently using shopify for our website and would like to have a few element integrated onto our website. A video with writing overlay as the store banner. 3 sections along the right side. Slide out Contact us button. Here is an example of a website that contains all of the above elements we would like to emulate: [login to view URL] (just the top section of this website with our elements.) We will also need instructions on how we can edit this to change video, titles, pictures in future.