These videos are usually embedded or published in a product page in a store alongside the carousel of images. Plus to have videos that demonstrate the utility along with supporting lower thirds / text layout for narrating the highlight. You Tube provides you a great collection of free audio (that requires no attribution) you can use on your videos.
Text: You could start the video with an intro introducing the product, follow it with lower third or captions that highlight the benefits of the product and end it with a punchline. Since the video would be used mostly inside a Shopify page, you do not have to worry about adding a call to action to buy the product. Ensure that the video carries a subtle logo with 70-80% opacity to wrap up the brand compliance efforts. video Design….