Look, I think it's possible that you might find some help from the nicotine, and I hope that turns out to be the case. It's very much a natural stimulant, so hopefully it will at least give you some energy. You should be careful, too, because, as is widely acknowledged in the medical establishment (aka medical scientists), to be one of the most addictive substances we know of. Tobacco, of course, has long been used by many native cultures for both its medicinal properties as well as in ceremony.
So I wish you well, and please do let us know how it goes.

Having said that, this particular "doctor", who is actually an ex Tennessee chiropractor who has gone on to be something of a Youtube (etc.) star, seems to be dealing in a great deal of disinformation, and I don't trust him as a source.
I only watched a bit of your posted clip, but I was on guard instantly after seemingly benign references to both Tucker Carlson and R.F.K. Jr.
He notably right away extols a now-discredited theory about smokers being somehow immune to Covid. He also emphasizes "disinformation" about the dangers of nicotine.
(The primary danger of nicotine is indeed its addictive power, and the lung cancers that result are basically from the tars that cigarettes contain, not the nicotine itself. Nobody has claimed that nicotine itself is particularly dangerous, aside from its addictiveness.)
I know people who have worn patches or gum for years (in lieu of smoking), and don't seem to suffer any particular ill effects.
Ardis has a weird fixation on snake venom, and at one point claimed that it was somehow responsible for Covid-19.
He is a conspiracy theorist, and not to be trusted.

Here are some actual scientific journal publications concerning claims of smokers' immunity to Covid:
https://www.nature.com/articles/s41533-021-00223-1
https://www.nature.com/articles/s41598-024-75632-6 colds
(actually the above one is interesting, from a small Dutch study, that did find smokers did somewhat better, but that it's due to their having higher rates of OTHER covid infections (e.g. colds), that might have increased their immune response)
https://biologyinsights.com/nicotine-and-covid-what-the-research-says-so-far/
https://journals.sagepub.com/doi/full/10.1177/14034948241253690