I'm not one to speculate on someone sexuality (but I will now

) but he has always been an ally, had a gay best friend and roommate and still affirmed several times he was str8. (He said in a video with the guy that the most attractive part of another man's body was the abs, that sound really str8 to me)
I just think being bi fits more with his online persona now and gets more people interested.
But again I could be entirely wrong, bisexuality does exist and is often kinda erased.
He doesn't owe anyone anything about his sexuality (honesty would be great but no one but him can truly know so we'll have to take his word for it)