Advertiser age restrictions
Some videos don't violate our policies, but may not be appropriate for all audiences. Certain advertisers can age-restrict their videos in order to comply with industry or regulatory guidelines regarding minimum viewing age that may apply to their content (but that would not otherwise be required by our Community Guidelines).
This age restriction is imposed by the uploader and is not a result of flags from YouTube's user community. Videos that have been proactively age-restricted by the uploader are, however, still subject to YouTube's Community Guidelines.