First, log in to your BigCommerce Site and go to Settings > File access (WebDAV). Once done, kindly follow the article below on how to use WebDAV.

Support Article for WebDAV: Click here!

If you would like to use a YouTube video, kindly download the video first. Once done, you can then upload the video using any FTP/SFTP software like CyberDuck with your site’s WebDAV details. Please make sure to upload it inside the content folder.

Next, is to go inside the Theme Customizer (Storefront > Themes > Customize button) and add an HTML widget where you would like to put the video. And then, copy and paste this script below:

HTML Script for the video:

calculator that computes the aspect ratio based on the resolution, it gives the aspect ratio of 2.98:1. The value that we will be using for the padding-top is 33.5% which we get from 1/2.98 or 0.335. That means 0.335 x 100% = 33.5%.

Once done, just save the changes and hit the Publish button.