Popular service YouTube got a new feature that allows you to filter videos with unwanted content. This may be, for example, a news clip containing scenes of violence.
To enable the safe mode, just click on the appropriate link at the bottom of the page with any video. And with the YouTube password, you can even block this setting from changing in your browser. Safe mode will be useful primarily for parents who want to protect children from unwanted content. ')
Source: googlerussiablog.blogspot.com