Video launching an app

We are a small car wash company who are launching an app that will allow our customers to book and pay for the service all within the app.

To launch the app I'm not sure if we should do one nice launch video or a series of smaller videos. Key messages to get across are

1. Simplifying the process of booking and paying for all your car detailing needs
2. Educating people on how to use the app as its the first of its kind in Cayman islands. This will include setting up the account.
3. Some sort of offer like we preload the wallet with one free car wash.

link to the app https://apps.apple.com/us/app/detailpros-cayman/id1599306270