ECALC vs Yunnec H520E

I test the webiste ecalc (eCalc - xcopterCalc - the most reliable Multicopter Calculator on the Web ).I use the free version of the program.

I would like to compare the time of the flight which is calculated by the website with the real time of the flight. My interests is focused on the Yunnec H520E (Drones : H520E OFDM - Craft Only) and the E20tvx camera.

I trying to put the correct parameters, but probably I make mistakes. I think so because the estimated result of the flight is relatively short. I marked the places where I think I could make mistakes (green frames in attachment).

Thank you in advance for your help.