The movie "This Is Spinal Tap" (1984) can be watched by renting or buying it on several digital platforms like Amazon Prime Video, Apple TV, Google Play, and others. It is currently not available for free streaming on subscription services, but it can be found on some ad-supported free streaming platforms like Xumo Play with ads. It is also available for purchase or rent on platforms such as Sky Store and Fandango At Home. The movie is a cult classic mockumentary comedy directed by Rob Reiner about a fictional British metal band on a disaster-filled American comeback tour. The film is praised for its sharp satire, comedic brilliance, and iconic scenes. Summary of viewing options:

• Buy or rent on Amazon Prime Video, Apple TV, Google Play, Sky Store, Fandango At Home.
• Free streaming with ads on Xumo Play.
• Not currently available on subscription services like Netflix or HBO Max, though it has appeared there in the past.

If looking to watch now, renting or buying digitally is the most straightforward way to see "This Is Spinal Tap".