SE has never been known for the most impressive marketing, or trailers. But the CG Yoshi-P had made for ARR has diffidently raised the bar for SE. I'm sure the main reason there hasn't been a load of epic dev walkthroughs or ingame trailers is because the game is still not ready for scrutiny. The lack of refined animations probably being the biggest glaring hole. When it is ready, which I'm sure will be around the time of Open Beta, I hope SE steps up their marketing campaign, not just more then it is now but better then it has been for past entries.

As for right now there are tens of thousands of views on unofficial channels showing off ARR with lots of positive comments, not to mention the hundreds of thousands of views on the official channel. I think it's on the right track for this point in time.