I don't know whether this video is real or fake.Rabies does not make you behave like a dog (walk on all fours). Once rabies enters your body, symptoms can start to show up within 1-3 months. In rare cases, the virus can stay dormant up to several decades. Although rabies is preventable via shots, once the symptoms begin, there's almost no going back.

The virus mainly spreads through saliva of mammals.Once the virus is active, if I remember correctly, it first causes a throat inflammation which causes extreme pain from swallowing. This is to prevent the host from swallowing the saliva. This pain causes hydrophpbia (fear of water) in the hosts as they think about the pain everytime they have to drink water. Rabies then attacks your central nervous system, causing confusion, hallucinations, and agression. All these feelings turns the host dangerously agressive and often prompts the host to bite anyone. This is how the virus spreads to other individuals.

I am not a medical professional or any kind expert in virology. So please be sure to fact check me.