What I have done with a few hunters and when time permits is to dry fire on the elk. Maybe a couple times. This helps a lot and could be edited out if you like.
Very good advise. We can practice all we want and feel good about it but each and everyone of us will react slightly different when the time comes.
After 32 years waiting for a Big Horn Sheep tag here in Montana and looking over upwards of 70-80 rams over 18 days when it came time to make it happen - I would have hated to see the results if the first dry fire was the actual round sent. After seeing my cross hairs move on the first dry fire I finally settled down - after 2 more I was ready and results were fit for camera footage.
I thought the same thing the first time. The hardest part is the filming other than the shot, once it's time to get busy and shoot you wont even know it's there. I remember briefly thinking they better have that camera ready because i'm not waiting.
"Fast is fine accurate is final"