Once you have eliminated the impossible, whatever remains, however improbable, must be the truth.
The chupacabra phenomenon first emerged in Puerto Rico in the 1990s. Unless one were willing to accept the absurd notion that an animal so large could live side by side with human beings in a heavily populated place for hundreds of years without anyone noticing, it's safe to rule out the possibility that it is a "chupacabra."
Despite "Bubba's" self-asserted 20 years of experience hunting "coons," I am not willing to accept his expert testimony on what noises raccoons make. I have had several close encounters with raccoons, and they make a wide variety of noises. Although I have never heard one growl, nothing in my experience with them suggests that they could not make such a sound if they were so inclined. So it's probably a raccoon with mange, as mentioned.
It also might be a coati, a South American cousin of the raccoon, which have been making their way north for decades and can now be found in Texas. Again, it would likely be an example with mange.
One thing it likely is not is a canine, as asserted by the "expert" to whom they spoke. The animal is shown using its front paw in a hand-like manner, which canines do not do.
UPDATE: Mystery solved. It's a raccoon.