I love the Chinese people and culture. I studied the language in college. I have moral disagreements with the CCP, but I'm not trying to attack or disparage it here.
To refer back to the videos, in the case where there has been a claim that critically sick people are being sent off to the crematoriums while still alive, I doubt that there is a high ranking official making that decision. It's probably fear, volume of cases, and utter exhaustion of some limited individuals in the health care system. If the story is even true.
I admit that many of these videos are dubious (especially the Falun Gong ones), but taken together there is some underlying theme here. Whatever that is, I think it's prudent to be cautious. We haven't seen an event like this in our lifetimes, so it's easy to forget how drastic and extensive they can be.
As an aside, I took two semesters of immunology in undergrad, a special topics virology course, and a bunch of biochem. I only have an undergraduate understanding, and a foggy one at that. Zoonotic diseases often have trouble when they jump the species barrier: they're too lethal, have a low transmission, etc. This one seems to have won the genetic lottery.