Yes you can sign up via Android TV and receive a free trial. To subscribe via Android TV, simply follow the steps below.

1. Download and install the Hayu Android TV app on your Android TV device. You can find the Hayu app by searching for "Hayu" in the app store on your device. 
2. Once installed, click on "Settings" from the Main Menu and select "Register".
3. Enter the requested information to create your account.
4. Once your free trial has elapsed, your account will be billed monthly via Google Play. To see pricing, click here.