I stumbled upon these video documentation titled 'Humonculus' in Youtube (I know Youtube is not reliable source, but the video to me looks legit and well video documented) by channel named Planet Nibiru. The videos were about a Russian Alchemist 'Kortney' that made an experiment by injecting human sperm to an unfertilized egg. The videos were from another channel/user also in Youtube which is the OP (Как Сделать). The title of one of the OP's videos is 'How to make a homunculus'.
From the transcript:
Today we are going to do an experiment on creating a homunculus. A homunculus is an artificial living creature. The creation of a homunculus is described in the medieval treatises by the scientist Paracelsus.
For creating a homunculus it is necessary to make a hole in the egg. [...] We have to inject the sperm. [...] The injection should be made exactly into the egg yolk.
The whole documentation runs with like 21 videos until just recently this year since they have not heard any update anymore from Kortney according to comments that the Alchemist was dead by a heart attack (which may also sound suspicious). These videos shows the trial and error until he was able to reproduce an organism from the egg until it grow and he was able to feed it.
The viewers were divided if it was fake or real, but the organism that moves in the video looks real unless someone has made an effort for good CGI. I would recommend you to watch the whole 21 videos from the Russian OP in youtube than the short video discussion in Planet Nibiru channel to give you the whole point of view.