We’re aware that some users are experiencing failed downloads when trying to download a video for offline use. We're currently working toward a resolution.
Downloaded to another device error
Some users have received a “Downloaded to another device” error after attempting to watch a video on a single Android device.
As a workaround, the state of your video can be reset by canceling the transaction and renting or purchasing again. Once the video disappears from the Google Play Movies & TV app (this may take some time), reboot your device, and you should be able to rent or purchase the movie again. If you'd like to try the workaround, please request a refund by clicking the Report a problem link next to your video here.