Need help making it work without a play ad button

[mozillr]

Hi

Hopefully I'm not wrong and this thing should make vast work on simple html5 video player. If that is correct:

I got the code from Quick Start of this page but for the vast to play in video, i need to click on "Play Ad" button.

Is there any way so vast ad would just load (preroll one) by clicking on play button of player itself? If there is please make a change to that code and send it here i'm really not good with coding and if it's not possible thank you for your great work anyway.