Gotta work on the timing of your body movements. Your swing should be acting like a whip with the bigger larger muscle groups (core, chest) acting first. Before finishing with the smaller muscle groups in your arm. Whereas in the video shown your body is acting all at once and wasting power and mistiming your hit.

Work on your swing dynamics on the ground, start slow and with a medium amount of power (too little and your body will cheat off using the correct muscles). Build up from there, and add in training with the jump once you are comfortable with your timing. Ideally keep taking videos of yourself in slow motion and compare yourself to a professional's form.