How to upload image or video from mobile device to content Creating node via mobile browser goes ok, but when adding image or video i can only record and upload which also works fine, but i can not access gallery and choose an image to upload.

Options available after clicking Choose file are:
- Camera
- Camcorder
- Voice Recorder
- Documents
That's a mobile OS issue. But in general, documents will open a list and show file managers at the bottom.