I am not a doctor, but what this guy just described in his video is very familar to the bubonic plague.
Almost half of the people of Western Europe died in a great sickness known as the Bubonic Plague. The plague was also referred to as "the Black Death” because the skin of diseased people turned a dark gray color
Death from the plague was horrible, but swift. The Italian writer Boccaccio said victims often “ate lunch with their friends, and ate dinner with their ancestors in paradise.” The first signs were generally aching limbs, and vomiting of blood. Then the lymph nodes would begin to swell. The lymph nodes are glands found in the neck, armpits, and groin. The swelling continued for three or four days until the lymph nodes burst. The swiftness of the disease, the enormous pain, the grotesque appearance of the victims, all served to make the plague especially horrifying.
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