[quote=@vancexentan]
Waiting for the timeskip. Don't think anyone wants to watch/read Takahashi's brooding while he builds king rex in real life. He won't have anything to say about it until the next day, and he probably won't care much about the open challenge. 'Hype men' aren't usually Takahashi's thing so a challenge to the king won't interest him all too much unless the plot deands it.
[/quote]

Even if he doesn't care about it, viral videos tend to get spammed in people's inboxes and on message boards due to, of course, being viral. It'd be pretty hard for him to not at least see the video or overhear a bunch of people talking about it.