How to tame the unmanageable Zucchini plant

I planted NINE zucchini plants and they all came out. And they grew wild and crazy. I got very little zucchini out of it. I was very frustrated with this, since it appeared that I was going to get a lot of fruit, but then all I got was a massive and wild growth of leaves.

Some lessons. This video seems to be excellent. Just TWO are needed, and they need MASSIVE PRUNING while they are growing.