At 0:08 through 0:09. Just before the cat turns around. You can see the cat’s chin is not moving. After the cat turns, it then make two sounds like “Oh-oh” and then it meows. So it sort of sounds like it was imitating the dog, but cats don’t generally do impressions.
I think it’s real, but I’m guessing that the cat wasn’t deliberately trying to imitate a dog bark. It’s making that noise for its own reasons, and it’s coincidence that it happens to sound sort of like a dog.
On the other hand, I have seen dogs who purred, and who almost certainly learned it from cats. And I’ve also seen dogs who attempted to speak Human, though generally not with very good results. But of course, dogs are more social than cats.
Looks like it’s moving to me, although the quality of the video leaves much to be desired. Seems rather coincidental that the “dog” would stop barking at exactly the same time the cat starts meowing. Also note that the sound the cat makes transitions from a full-on “bark” to a half-bark/half-meow, to a regular cat meow. No way this is a fake.