The second step of the forehand volley is the forward swing to contact. Once you have pivoted and turned your shoulders and laid your wrist back, you swing forward by 1) stepping forward into the court with your inside foot and transferring your weight to that foot and 2) swing forward with your tennis racket and your arm to your contact point, which will be out in front of your body. You do these two things at the same time. The key to swinging to contact on the volley is that the arm and racket swing forward to the tennis ball by driving forward together as a unit from the shoulder. What you can also see at 0:45 in the video is that there is both a forward and a downward component to the swing path of the tennis racket. It’s important that when you hit your forehand volley that you swing down slightly, but you do not want to chop down on the ball. This will put some backspin on the ball and give you a little extra control.
Finally, once you make contact with tennis ball, you will have a very short follow through. The racket stops much sooner on a volley than it does on a forehand groundstroke. In fact, it might be dangerous to actually try to focus on the follow through element of your forehand volley when you are first putting the shot together. Instead, focus on driving the racket and arm foward from the shoulder as a unit, and let the follow through take care of itself at this point.
At 1:25 in the video, Frank has completed his preparation. He swings forward to the tennis ball by stepping into the court with his inside foot and driving the tennis racket forward with his arm as a unit from the shoulder. As he swings forward he also swings slightly down on the ball, but he’s not chopping at the ball. He makes contact with the tennis ball out in front of his body. After he makes contact, he has a very short follow through as the racket recoils slightly. Again, the key here is that Frank is focusing on driving his arm and racket together to contact as a unit from the shoulder.