SAG-AFTRA has weighed in on this issue, both to the press[1] and on their website[2].

From their site:

> Do you create your own content on YouTube or other social media platforms?

> If a brand reaches out to promote their product (paid or product trade) on your platform, that is a commercial and SAG-AFTRA can have your back.

> SAG-AFTRA covers advertisements on all platforms. Get fair compensation, access to health insurance and a team of experts making sure you are PAID!

[1] https://www.tubefilter.com/2018/08/15/sag-aftra-content-crea...

[2] https://www.sagaftra.org/get-involved/ads-go-union/creators-...