1) The spike protein that is the basis for the vaccines' operating principle is now known to be a pathogen.
2) Some people, for reasons unknown, react very badly to this pathogen - blood clots, heart attacks, strokes, and other cardiopulmonary events can occur upon exposure.
3) The vaccine supposedly results in this pathogen spreading beyond the injection site. In fact, perhaps this is by design (the Canuck in the posted video hints at this, but never says it). If indeed this is intentional, my guess is that it was deemed necessary to increase efficacy. (More exposure to spike protein = more immune system response, maybe?)
Fundamentally, I think we fucked up with the approach of the vaccine. Everyone wants to shit-post about mRNA (not that I'm yet on-board with this tech) or Bill Gates and his global depopulation plans or how this is just Phase II of a three-phase biowarfare attack by the Chinese, and I agree that all three of those theories would potentially make for a rippin' good summer movie if based upon a Michael Crichton book. But it works appear that the real "crime" (insomuch that one occurred) is that we took the quick-and-dirty approach (using the spike protein as an inoculant vs. the presumably far more complex nucleocapsid protein), we failed to understand the potential impact of this protein in the body, we failed to test it broadly enough (an improvement impossible task if we don't know what interactions we're looking for), we got overly aggressive with both the design of the vaccine itself and the administration thereof (two closely-spaced doses), and then we deployed it far too widely in pursuit of meaningless metrics aimed at achieving a magical "herd immunity" number that likely does not exist.
On that last point, I think there is more going on with the race to immunize everyone instead of just the vulnerable, and I think it goes beyond corporate profits or Fauci's masturbatory fantasies involving high double-digit numbers (I'm not judging). I think the issue is more likely related to "leakage"; that is, the extent that a vaccinated individual can act as an asymptomatic carrier. Virtually everywhere in the world that the vaccine was administered, cases spiked afterwards regardless of where that region was at prior to the campaign. My guess is that the medical community knows that a partial vaccination campaign - say, one that targeted the elderly and the otherwise vulnerable - would have left us with an overall increase in the transmission. And so we're jabbing pregnant women and adolescents and a bunch of otherwise-healthy people.
Damn, that quickly turned into a tl;dr