These potentially seem like some fairly onerous restrictions, and would potentially exclude nearly all of my favorite youtube channels.
What is your definition of "creators who involve with:" - does this only cover content posted on your site, or any content the creator makes across any publicly available service? To what extent can creators discuss these topics if they don't actively manufacture/promote/distribute them?
Could you be more specific about creators that are "involved in weapons" - is this anything that can be used as a weapon or specific to military/semi-military applications? Would Joerg Sprave's slingshot channel be prohibited? What about someone who makes videos about forging/sharpening knives? Are creators who discuss war journalistically or historically disqualified? Non-miltary RC drone hobbyists like Tom Stanton?
"Chemicals" seems pretty vague. Does this preclude all chemistry and biochem related content? I'm a big fan of channels like NileRed, CodysLab and ThoughtEmporium, would they be prohibited? Would videos which discuss water treatment or concrete chemistry or metallurgy be disqualifying?
"seeds or plants" - are creators who discuss gardening or farming disqualified? Cooking vegetables? Primitive Technology-style makers which discuss creating objects from plant materials?
How do you define "adult" content? Does this include creators working on LGBTQIA activism? Does this include creators who create instructional content while showing non-nipple cleavage? Does this include creators involved in sex-ed/harm reduction campaigns?
Also, are there any geographic restrictions? Can creators outside the US use your service (in countries which are NOT on the US OFAC sanction list)?