Rooting lg g4 V10-TWN-XX

[Jamaicanater]

I recently found a .kdz file for my lg g4 h815 (V10-TWN-XX) and there were no instructions listed for it or any videos where I could check the reviews left by other viewers, how can I know if a kdz file is safe to flash? Can I ?
Also if you know any link with instructions on flashing lg g4 H815 V10-TWN-XX please link it