I personally feel like 99% percent of the time the reason people don't get high is because they don't know how to breath in. obviously it can't be proved either way without a study, but I would bet it's user error.
also nice video. I really like your presentation and demeanor, and also you come off as someone who has actually done research and is genuinely interested in the science behind cannabis. I would recommend adding visuals to hold people's attention and to better explain what your talking about, but everything else about your content seems great. keep it up