I watched it to learn something about kill zones on African animals. I was also interested in the Author's "take" on bears and their vitals. I saw no problems there. I suspect he wasn't the one doing the shooting, and was using other people's video clips.
I saw what you are talking about, including the fingers(shown twice) however the second time, it looked like he was ready to pull the rear trigger with middle finger, with forefinger posed to pull the front one if needed. Now, some people do pull the rear trigger first so I had to give him leeway that perhaps that is what he was doing. ALL shooting doesn't go 100%, 100% of the time - well, it does, but only when I or my buddy Keith are doing the shooting.