Call me skeptical.

There is good evidence that China was working on bioweapons in the WIV. There is some evidence that the US was funding research in that laboratory in order to spy on China's bioweapons progress. There is good evidence that COVID was engineered from a bat coronavirus: they added a furin cleavage site with genetic engineering techniques (e.g. CRISPR) and then performed "serial passage" on the virus through humanized mice (mice with human ACE receptors) in order for the virus to get better at infecting human ACE receptors. Then this weapon in development accidentally leaked.

Given that evidence, how does this video's theory play in? I don't have the time to watch this video, but what you are describing sounds completely new to me, completely out of left field. Snake venom? An autoimmune disease?