Here is the new Youtube gun policy. The relevant section I believe was quoted to Hickok is:
"Links in the title or description of your video to sites where firearms or the accessories noted above are sold. You can link to sites that discuss or review the items as long as those sites don’t sell or give away those items directly."
The accessories listed:
"- Accessories that enable a firearm to simulate automatic fire,
- Accessories that convert a firearm to automatic fire, such as: bump stocks, gatling triggers, drop-in auto sears, or conversion kits,
- High capacity magazines or belts carrying more than 30 rounds."
Also banned:
"- Showing users step-by-step instructions on how to finish a lower receiver in order to complete fabrication of a firearm.
- Live streams that feature someone holding or handling a firearm, regardless of whether or not they are firing it. Note: this does not include firearms in video games.
- Live streams that feature someone transporting firearms from place to place, such as by carrying them or traveling with them by car, truck, or other vehicle. Note: this does not include firearms in video games."
So something like guns.com sells guns AND banned accessories like 110 round drum mags in .22 LR. SDI doesn't sell guns or accessories, but they do teach you how to manufacture guns so it could be argued that they aren't allowed either if Youtube doesn't allow you to show someone how to machine an 80% lower or instruct in any firearm manufacturing. You also are not allowed to post content teaching someone how to manufacture ammunition (reloading probably counts).
I am not optimistic that other guntubers will get a different answer than Hickok. Fucking jewtube.