gables....you may or may not need to hold...or slow down. That will be ultimately up to you to decide. Some folks are better at snap shooting, and others are better at holding. Find what method works for you. If shooting quick like in your clip works for you, stick with it, if it don't then slow down and 'hold' if need be. Just make sure you learn how to 'hold' correctly.
What you do not want to happen is for you to stop pulling completely and come to a dead stop. You want to continue to apply rearward pressure so you don't start creeping forward and loose that back tension that you have already acquired.
And to be more versatile, you should be able to shoot both ways....but get your back yard shot down either way and go from there.