I watched the video again in peace.
He loaded is gun before. Maybe I'm wrong.Sorry.
Nevertheless he is not a recommendation (for me).
He sure did, however:
After his first two shots(the two initial ones), he reloads the rifle, chambers a round and cranks the scope down to low power, riming it like a child in preschool. This he could never achieve before(when I was present). Bang, bang, bang, bang, bang-oops!
He is using a 375 H&H.
Now a DG rifle in this caliber can take 5 in the magazine. Let's for arguments sake presume the rifle he is using only takes 4 in the magazine.
The next shot(who knows if it was the third shot on the ground) but in the video it is the third shot. The buffalo is lying down facing him, he takes careful aim and from the reaction of the buffalo it appears he misses the buffalo entirely(probably attempted a brain shot). The buffalo runs off.
The next shot is the one where he jerks the trigger on an empty chamber! nothing ejects from the rifle action so the gun was empty! then loads only one bullet and takes the next shot.
So this means between shot three(at the lying down buffalo) and shot empty chamber he banged off another minimum 3 probably 4 rounds without topping up the magazine again! Not the first time he has done this!
Very dangerous shooter and real foolish for endangering the lives of the trackers, cameraman and who ever else was present during the circus.
The PH probably realized this early on in the safari and decided discretion is the better part of valour(it's better to avoid a dangerous situation than to confront it-referring to the shooter and not the buffalo) and trying to explain things to him is of no use and held his distance, but still ready to deal with it if it was needed.