Product Update Videos:
These videos are great for updating existing customers on new features for existing products/services or revisions. You can work with a video production company to shoot a brief video where you explain what features you have added to your products, why those features are important, how customers can use the features, and the cost implications of those features (if any).
Startups and other companies these days prefer to launch products as soon as they are commercially viable, even before all the possible features have been included. Customers purchase such products/services with the understanding that they are still a work in progress. If your company uses this kind of business model, you have a responsibility to your customers to put out a product update video every time you add a feature to your product so that they are aware of the progress that you are making.