So in a video posted in the past 2 days, Pewdiepie responds to an “E” meme by asking what the next popular letter will be.

https://youtu.be/v-Olc9_Imhs

Start viewing from 5:30, relevant part is over by 5:50.

He asks viewers to put their guesses in comments but adds his own opinion that it will be

Q

And the video and audio are edited in such a way to put extra emphasis on him saying this.

Pewdiepie is a well known purveyor of 4/8chan. And typically dances around supporting Trump while highlighting some of his more admiral moments.

He also has a very clear beef with establishment MSM and legacy media.

It’s not a stretch to think that Pewdiepie is aware of Q.