Where are the safe search settings?
SafeSearch can help you block inappropriate or explicit images from your Google Search results. The SafeSearch filter isn’t 100% accurate, but it helps you avoid most adult content.
Restricted Mode is an opt-in setting available on the computer and mobile site that helps screen out potentially objectionable content that you may prefer not to see or don’t want others in your family to stumble across while enjoying YouTube. You can think of this as a parental control setting for YouTube.
Google Safe Search – 
YouTube Restricted Mode –