To access the SBS On Demand app on your Fetch TV box, from the main menu, navigate to Apps > TV Apps:
Select SBS On Demand, and you'll be prompted to sign in or create an account:
If you have an existing SBS On Demand account, enter this email address on the following page. If you don't have an account, enter the email address you wish to use and you'll be sent a verification email to create an account.
For existing account holders, once you've correctly entered your email, you can either enter your password manually and hit NEXT or choose to be sent an email link to sign in by selecting sign in via Email:
If you choose to sign in via email, you'll see the following screen:
Tap the yellow 'click here to sign in' in the email received, and begin watching!