You can watch "How to Train Your Dragon" on several streaming platforms:

• Peacock: The movie is available to stream on Peacock, where you can download the app and watch it directly

• Hulu: The film is also available for streaming on Hulu

• Max (formerly HBO Max): You can stream "How to Train Your Dragon" on Max with a subscription

• Additionally, it is available for purchase or rental on platforms like Amazon Video, Apple TV, Fandango At Home, and Microsoft Store

So, if you have subscriptions to Peacock, Hulu, or Max, you can watch it there. Otherwise, you can buy or rent it digitally on major platforms.