Troye Sivan, 19, started vlogging back in 2012, since then his channel has amassed over 2.5 million subscribers and 100 million views.
He's collaborated with A-list You Tubers like Zoella, Hannah Hart and Marcus Butler.
Other flags include the Victory over AIDS flag, Leather Pride flag, and Bear Pride flag.
The lambda symbol was originally adopted by Gay Activists Alliance of New York in 1970 after they broke away from the larger Gay Liberation Front.
Troye, however, came out a full year before his major-label debut.