I think that he might be referring to the tumors in rats thing. Amel covered this a while back:
There has been some “hubbub” published by certain rabble rousers bent on building an audience of angry people eager to donate “for the cause”, or buy nonsense products sold to them on air… think “Alex Jones” type of people. They were pushing the idea that “RFID implants cause cancer” and pointed to two papers that mentioned surprise tumor growth around the implant site of the study animals. The thing they don’t tell people is that both these papers studied various aspects of cancer, and the lab animals they were using to test on were either genetically destined to get cancer, or were given chemicals to induce cancerous growth - in other words, those animals were definitely getting cancer so it could be studied. The part that was surprising to the scientists performing the study was the large number of animals that did develop a tumor around the implant site (along with a number of other tumors throughout the body). This was not really surprising though, because tumor growth is often initiated in areas were there is inflammation or inflammatory response. Even getting an injection or IV line can cause tumor growth. It’s so common it’s called Injection-site sarcoma (ISS), also referred to as fibrosarcoma. Because these pet implants are coated with anti-migration parylene coating, the tissue that grows into that coating will always be in a slight state of irritation and exhibit inflammatory response.
Another weird thing is that the guy who made the video against it, mentioned that people where “pushing the use of NFC implants”. Sure, some of us love the idea but I don’t think that anyone in the biohacking community would press others into getting implants. We’re the ones talking about morphological freedom after all.