Nope, it's serious. Sky News Australia is owned by Rupert Murdoch's News Corp, which explains the far-right lunacy that it is known for.
Sky News UK is owned by Comcast, and is generally considered to be a much more professional and respectable news outlet. Not perfect, but more BBC than Fox News.
I'm talking about the actual television channel and news site. They're very different to the Australian Sky News which is just a soapbox for crazies.
What do you expect? YouTube comments are always a cesspit.