This camera app was created as a training project to learn how to use Camera2 API. It is designed to be used as a stationary video camera that detects movement and start recording accordingly.
The navigation is done with Intents, because it is simple and it does not make sense to use some advanced techniques there. The same can be said about most other things - for now it is just an MVP prototype.
For interaction with Yandex.Disk their SDK was used