There's also a difference between a business and a private individual posting video to Facebook. A business posting definitely increases exposure to their company and would be considered commercial. If I post video to my Facebook or my non-monitized YouTube there's no reasonable way for that to be considered commercial. I don't care if YouTube generates click revenue on their own, if I don't get paid I'm not engaging in commerce. If a company uses that video for free it's on them, not me, even if I give permission.
That said, I'm not talking about people claiming hobby to skirt the rules and hook up a friend's business. That's clearly commercial intent. I'm talking about video I would have shot for myself anyway, and I allow anyone to use it. I forget what it's called, but as a creator you set your own level of permitted use on your images. I have many images that I released to be freely used by anyone. I believe any business can legally download and use them even though I'm not being paid. There are entire websites for businesses to get free images to use, I believe the people providing the photos can be random unpaid amateurs.