Incognito mode for youtube is out for Android | How to use it?

What is the incognito mode? According to Wikipedia, “Private browsing, privacy mode or incognito mode is a privacy feature in some web browser to disable browsing history and the web cache. This allows a person to browse the web without storing local data that could be retrieved at a later date. Privacy mode will also disable the storage of data in cookies and Flash cookies.” For instance, Chrome calls it