Step 1: Go to the Wii Shop Channel on your Internet-connected Wii.
Step 2: Download the Amazon Instant Video app.
Step 3: Launch the Amazon Instant Video app from your Wii.
Step 4: Select "Register Your Device" and make a note of the code that appears.
Step 5: Go to the Amazon Instant Video device registration page from your computer and enter the code that was displayed on your Wii, then complete the device registration.
Step 6: Your Wii should now display a note saying that your Wii was successfully linked to your Amazon account. Click "Continue" and the app should now display videos for you to stream.
That's it. Keep in mind that the video quality from the Wii, even if you have it connected to an HDTV, won't look quite as good as, say, a Xbox 360, because it only supports SD (480p) video. Still, for those who currently own a Wii and want to watch Amazon Instant Video, especially Prime Video subscribers, the app is a welcome addition.or