Animations require lots of AA indeed, also there is a parametrer called distanc blurring in the animations parameters. You need to check this options to avoid flickering. And maybe use the "soft" antialiasing preset.
The demo reel was created py Phoul, the best and most experienced Vue animation expert around, so don't expect to get this kind of results just after a few weeks of using Vue. Some of his scens are available either for free or a small fee over at cornucopia3d. Maybe you could get some of them and study the setings.