The footage is believed to have been shot at a restaurant in Guangdong, South China.
It shows a little known speciality in the area called 'San Zhi Er', or three squeaks, where the baby rodents are eaten alive with a plate of sauce.
Another video here. Accompanying text:
Newborn mice (San Zhi Er) are eaten alive with chopsticks and served in a spicy sauce. They are called "three squeaks babies" because they would scream three times: the first time when they are grabbed with the chopsticks, the second time when they are dipped in the sauce and the third final squeak inside the mouth of the customer. Also this dish has been banned in China, but it's possible to find it.
I can understand people making Youtube video pranks based on historical data or urban legends (that first one seems fake), or maybe (older) people still privately eating things they know from their past.
But my specific questions are:
Can 'San Zhi Er' be ordered in Chinese restaurants?
Is 'San Zhi Er' offically banned in China?
Those are not mutually exclusive; it could be that the dish is officially banned but still available.