Haven't watched the video and won't. Don't see any point in giving it view stats when all I'm hearing is thumbs down.
I do not hold with PH rapid fire immediately after client shoots. Unless the buff is shot in the brain, it's not going down with one shot. Any PH certified to guide buffalo knows when one has been properly hit (i.e. in front shoulder). Give it time to die. If it decides to charge, then everyone shoots till it falls over. I have seen plenty of videos where client places a bad shot, sometimes many of them, but PH still gives him a chance to finish the job.
Sullivan is a typical influencer. If he wasn't full of himself, he wouldn't be successful. Some (most?) people are attracted to that ... for various reasons. Which is also an important component to an influencer's success. I am probably the only person on this forum who would pass up a hunt with Ruark, Hemingway, or Capstick. All successful influencers who could spin a great yarn in their writing (no internet media in their day). But in real life they were also fatheads who could be awful to be around, especially when drunk. I think today they wouldn't stand a chance with internet media.