Holy fucking cache, Batman. I had to load his youtube page in incognito mode to see that version of the header. I was still seeing the old version on normal tabs.His website has looked like that for over a year now. So no, it's the serious variant.
Here is a Wayback Machine of it on March 10, 2020.
Yet it had the old "circus ring leader" era scheme on September 25, 2019.
That gives us a 5.5 month window for when it happened. Also I think you haven't looked at his channel properly in a while:
Nevermind what I said and I apologize for the misunderstanding. This just keeps getting worse and worse.

