Our dogs have dreams from time-to-time but not like this dog and what I saw with this dog, especially in the second video, really concerned me... interesting when he barked in that second video and then stood there with his ears down I knew something wasn’t right and one of my dogs came in the room acting very concerned about that bark.
It's one thing if they twitch and mumble a little -- this is something different and far more serious.
Looks to me like the dog is having seizures. The staggering and the odd barking is typical of the mental confusion that follows on a seizure.
They need to get the poor guy to the vet for some meds instead of just making movies and laughing at him . . . .
I didn’t see a second video.