@Gringogreg: Disney+ is available on Samsung Smart TVs from the 2016 K Range and onwards, therefore if your TV is compatible then head to Home > Apps > Search (top right corner) > Disney+ > Select the app > Install. I hope this helps. ^AL
Great. So my TV bought in 2014 doesn't have this function. Just spent 30 mins on the phone to Samsung support trying to solve this - they didn't tell me that.