They promote Australian "Freedom Wine" and Taiwan "Freedom Beer" in the rest of the video. I'm guessing they have a media policy that any (government?) depiction of alcohol in a positive context must have the messages.
The average Taiwanese isn't this annoying. What you're seeing are the type of people that post on r/Taiwan and Mandarin Subreddits bitching about Mainland China 24/7. I've met a few of these types and they can easily be described as your average Taiwanese Redditor or the equivalent of that lib you know who hangs Ukrainian flags outside their house.
I used to go on Reddit to see the insane shit people from my country would say. They would obsess over Ukraine and call Lula leftist scum. Something I haven't really seen people do in person.