Do you mean, like this one
Graham Hunter and
LivingTheDream?
Magnum TV S4:E3- Cape Buffalo Showdown
The hunt starts at 13:00 minutes ... and culminates after 17:00 minutes...
A very patient buff, and obedient too, he even stays when the hunter says "no" (don't leave).
There are also some interesting bits at 2:56 about asking what the PH wants his client to shoot; at 3:20 "I have had a lot of experience and shot a lot of buffalo" and at 14:50 when he reloads. The rifle appears to be a Win 70, so if he started with 3+1, fired 2 (maybe more the footage does not show), reloaded 3+1, reloaded 1, it looks like it took at least 7 shots to drop the buff.