Noob fill question

Hello, I am new here, And new to Airguns. I recently bought a Matador R5M and I love it. However I do not know how to fill the gun. I never thought that I would have to be taught because it looked so straightforward. However I really feel bad bothering the guy who sold me the gun Because he was extremely helpful one of the nicest guys I ever met. And I hate to inconvenience him. I would appreciate if you could check out my video and see if I am doing something wrong or if possibly the gun might need a repair.