Anyone can hire an actress to pretend to be a stroke patient and then show a miraculous recovery. In the video, too little time elapsed between the injection and the “miraculous recovery” for this to be anything other than a scam. Furthermore, there is utterly no discussion of what the injection is, its mechanism of action, or any details of the research that developed it. Scammers usually don’t describe any research, because they don’t have any. But they are very good with sciency sounding gobbledygook.