YouTube Safety Mode
Google has recently linked the Google "safe search" settings commonly used at schools and other organisations to filter out unsuitable content and images from Google Search results and the YouTube "Safety Mode" feature designed to filter unsuitable videos.
Howeve, the YouTube filter is much more prone to false positives because of the comments on videos rather than the content of videos themselves being questionable. In these cases, it may be necessary to disable the YouTube "Safety Mode" at least temporarily. The instructions below show how to do this.
YouTube Safety Mode Warning
If you are trying to view a video that you know is OK, and receive the "This video is unavailable in safety mode" message, then you may have to disable Safety Mode temporarily in YouTube
Login to Google Apps
To disable Safety Mode, first make sure that you are logged into Google Apps (Gmail, Gdrive, etc.). If you are not, log in to your account before proceeding.