It started on 4chan, only moved to 8chan (likely a different poster) much later.

See for example: https://www.nbcnews.com/tech/tech-news/how-three-conspiracy-theorists-took-q-sparked-qanon-n9005

Q posts moved from 4chan to its more toxic offshoot 8chan in November after a post claiming the original board had been “infiltrated.”

Gesticulating is apparently a key element.

This is very true, but I assume they are translating from English to Dutch.

Edit: I was wrong.