The country code top level domain (ccTLD) .YT is assigned to the French-controlled islands of Mayotte near Madagascar. The TLD is not restricted for use. There are no requirements for a connection to the country itself and it is available for use worldwide.
There are no officially configured second-level subdomains. The .YT is actually connected to France and AFNIC.
The .YT ccTLD has been activated by Association Française pour le Nommage Internet en Coopération (AFNIC), the sponsor and registrar. The ccTLD has been available since 1997. The ccTLD is not used much, although there has been a recent trend for dedicated YouTube channels to create a .YT domain.
Iron Noder 2017