For now, you can download it for free from the App Store and Google Play Store.

Becoming a member of Uppy is very easy.
Just download the App and answer the questions that appear on the screen, and that's it.

1) Turn your phone/tablet to landscape position.
If your screen sensor is on, the video will automatically be full screen.
2) Tap the video player once and the full screen button will be highlighted in the lower right corner.