While I am all for more people from our area of the globe being exposed to CoE, I think you believe marketing to be more localised than it actually is. I personally watch a fair amount of youtube content, and I don't think I watch a single Australian, for two reasons.
The first being there are basically no Australian youtubers, because our internet is mostly terrible, which makes streaming difficult, and constantly uploading videos and downloading new games a bit of a chore. The second being I personally don't really care if the person I watch content from lives in the same country as I do.
There are more complicated points to this issue. Australia's population is smaller, and we have less of a density of MMO players, partly because most games don't have Australian servers. There are probably other reasons, but basically none of my friends play MMO's, yet I know plenty who play the churned out console trash franchises.
Word of mouth is great for marketing, and I would happily try to convince my friends to play with me, but none of them play MMO's. Other than that, the people out here who do play MMO's will have no trouble at all finding out about CoE by looking on youtube and other places like game news sites, having an Australian person promoting it has basically nothing to do with it.