Steps to Transfer
Use Android File Transfer and locate your video in the OpenCamera folder.
1. Make sure your device’s screen is unlocked.
2. Connect your device to your computer using a USB cable.
If you’re asked to select a USB connection on your device, choose Media device (MTP).
3. Use the Android File Transfer window to drag and drop files.
Locate your video (probably in the DCIM-->OpenCamera folder) and drag it onto your computer.
4. Eject your device from Windows, then unplug the USB cable.
Next step: Trim