https://developers.google.com/youtube/terms/developer-policies
YouTube API Services - Developer Policies | Google for Developers
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https://developers.google.com/youtube/terms/branding-guidelines
YouTube API Services - Branding Guidelines | Google for Developers
Learn about the rules and requirements for adding YouTube-logoed branding or attribution to your application, device, or marketing materials.
youtube api servicesgoogle for developersbranding guidelines