After ensuring you have a good video that distinguishes you from your competitors, ensure that there is a follow-up button where they can subscribe to the website. This ensures you create a personal relationship between you and your customers and they have a sense of belonging to the brand. This will keep them updated with any new products or any changes that have occurred recently.
It obvious after watching something that is interesting, funny and cool on the internet you are compelled to show it to your friends. Therefore if you create a good video, it will be shared by the viewers. Ensure the video is something that is worth being shared.