1. Panther, mountain lion, cougar, catamount, puma, etc. are all the same thing. The Florida panther is too, but based on greography it’s considered a subspecies and an endangered one at that (same thing with American Black Bear and Louisiana Black Bear).
2. There has never been a black one photographed, killed, run over, found, or used as a mascot at Ole Miss. Ever. In the history of mankind.
3. They were extirpated from Mississippi through the 20th century.
4. Western mountain lions have been expanding their range and moving eastward. They have been verified in Northern Arkansas and one was verified somewhere in Tennessee.
5. It is quite plausible that a male could wander into Mississippi because they have a large range. It is plausible that, like the Black Bear, they will one day end up with a small population along the Mississippi River. But they prefer seclusion and avoiding humans. We don’t have the hundreds of square miles of wilderness that they prefer.
6. That “field” in the Hernando video is little more than a yard. It’s probably 50 yards wide. That housecat would have been 20 or 30 yards from the man taking the video.
7. The man that took the video said the cat was nowhere near the size of a mountain lion.