F. Business-to-Business Exchanges
FDA does not consider this regulation to apply to businesses distributing free samples in a limited quantity (i.e., no more than necessary to achieve a business or market goal, such as awareness of and exposure to the product for the purposes of product or inventory selection) to another business as part of a genuine effort to sell or market a tobacco product to that business.
Most reviewers are a business, whether they admit it to their viewers or not. If you look in the info available under the videos, most have numerous affiliate links. Also, any monetization ads that show up on the video is considered income, and is subject to the taxes associated with a sole proprietorship.