Looking for the source, found this from last July:
The video first appeared about two weeks ago on a Venezuelan Facebook account titled “Vídeos Mundo Curioso,” which posts videos of an unusual nature. The video has logged over 9.3 million views on Facebook alone. It was then recorded and posted to the YouTube.com channel “Red Capital News” on July 6, 2018, where it has received another 5,000 views. From there it made its way onto the Twitter account @KBMAGAFL where it has received over 6,000 shares.
I don’t doubt that they are dolls. But as another poster noted, there is something sinister and disgusting about people using them to joke with.
Granted, I have seen people clowning around with CPR dummies and even real or manufactured skeletons from humans that are used in a medical classroom, but it seems different in some way to me.