In India, not only YouTube and G-mail, but the service of many important apps like Google Drive, Google Meat were interrupted. People are constantly sharing this information with the Google down hashtag. This is why Google down and YouTube down hashtags are trending continuously on Twitter.
Responding to the complaint of Gmail being down, Gmail asked the user on Twitter, “Can you share some more information about what is happening with your Gmail account. Also how are you running the game (on Android, IIOS or browser)? We will try our best to help.