The Red Diamond Play Button is a special award by YouTube given to channels who reach 100,000,000 (100 million) subscribers. There are currently only eight YouTube channels that have received this award; two individual YouTubers: PewDiePie and MrBeast, as well as six corporations/brands: T-Series, Cocomelon, Like Nastya, Vlad and Niki, SET India and WWE.

It is made of dark glass or brass with a piece of red baccarat crystal made of gold, barium oxide and sand in the center encased in a red briefcase with the YouTube logo stamped on the front. This Play Button was revealed through a tweet from YouTube themselves on September 6th, 2019. The tweet contained a video, being a time-lapse of the making of the button with Baccarat's crystal work. 

There are 8 of these play buttons in the world: One for T-Series, one for PewDiePie, one for Cocomelon, one for SET India, one for MrBeast and one for WWE. It was confirmed with a picture if there is one for ✿ Kids Diana Show.

In December 2022, JackSucksAtLife got hold of MrBeast's Red Diamond Play Button. With this, he sent the award into space. SentIntoSpace also made a video on this because they helped the mission.