What this and other doctors/researched have noticed is that the spike proteins from these vaccines do not remain at the site of the injection which is how most vaccines are supposed to work. Once that happens, they are free to cause all kinds of damage around your system such as creating blood clots. We may not be certain about the exact mechanism of how this happens, be we know it does happen because if it didn't, some of the body wide side-effects we see from people would not be possible if the mRNA remained where it was supposed to.

There are other videos that go into more details about this but they tend to be long. The benefit of this video is that it's short and simple.

The main takeaway from a lot of these videos that go into the details of how this vaccine is supposed to work and how it definitely doesn't work that way (per the spike proteins not remaining at the injection site) is that if the CDC or government had any ethics, they would have pulled these vaccines as soon as soon as they saw this happening because this is a major red flag. But they didn't. Instead they keep trying to cover up the truth.