"I want to put this on a USB drive to watch on my TV." Solution: Legal downloads have DRM (Digital Rights Management) that prevents copying to USB. To watch on a TV, use an HDMI cable from your laptop, or buy the physical Blu-Ray.
The original animated trilogy is widely available on subscription services and digital stores. : Netflix : Both the first film and How to Train Your Dragon 2 how to download how to train your dragon
Here are the top platforms supporting , How to Train Your Dragon 2 (2014) , and How to Train Your Dragon: The Hidden World (2019) . "I want to put this on a USB drive to watch on my TV