In fact for the average layperson, figuring out what's good information and what's bad information on YouTube or the internet in general is probably beyond their abilities. I know my dear mother, who I love, can't do it. I like to think I can, but I'm the least qualified person to judge that. I'm also not average.

But I want to point out that one of the main treatment options for cancer is Chemo, which is basically injecting/ingesting toxic substances in the effort to weaken or kill the cancer before killing the host. So chlorine could well work in the vein, but I wouldn't want to use myself as test subject A in an unregulated pre-clinical trial.