Table 3.

Description of principles of the Health on the Net Foundation Code of Conduct [8] and the number of COVID-19 vaccine–related YouTube videos that met each criterion.

Principle	Description	Videos, n (%)
Authoritative	Any medical or health advice provided in this video will only be given by medically trained and qualified professionals unless a clear statement is made that the advice offered is from a nonmedically qualified individual or organization.	27 (56)
Complementary	The information provided is designed to support, not replace, the relationship that exists between a patient and his/her existing physician.	38 (79)
Privacy	The information in the video maintains the right to confidentiality and respect of the individual patient featured.	0 (0)
Attribution	Where appropriate, information contained in the video will be supported by clear references to source data and, where possible, have specific links to those data.	20 (42)
Justifiability	Any claims relating to the benefits or performance of a specific treatment, commercial product, or service will be supported by appropriate, balanced evidence in the manner outlined in in attribution principle.	20 (42)
Transparency	The designers of the video will seek to provide information in the clearest possible manner and provide contact addresses for viewers who seek further information or support.	17 (35)
Financial disclosure	Support for this video will be clearly identified, including the identities of commercial and noncommercial organizations that have contributed funding, services, or material for the video.	7 (15)
Advertising policy	If advertising is a source of funding, it will be clearly stated. Advertising and other promotional material will be presented to viewers in a manner and context that facilitate differentiation between it and the original content.	2 (4)