After initially being pretty much out, once he bacame popular he went deep back into the closet and went through a strong gay denial period (he never once said he was indeed straight or denied he was bi). About this time too a deeply personal love letter video was accidentally leaked online due to a YouTube glitch from his boyfriend and creative partner Phil (now 9 years together)—they tried to write it off as a prank vid and leaned hard into relationship and sexuality denials... it’s only in the last couple of years that they are living more openly.
For anyone that wants to go deep down the rabbit hole, there’s a YouTube playlist of over 400 clips of Dan’s male attraction mentions...
https://www.youtube.com/playlist?list=PLKI0r2LYGKshsjXgE6hWnR4SIbIAhKuGd