The clip features a lot of concept art, behind-the-scenes shots, and talking-head developer interviews as well as an English-dubbed voiceover that's heavy on lore and backstory bits. There's also a lot of commentary regarding ASTA's design philosophy as well as how the developers are striving to avoid Asian MMO cliches to create a title that is original yet familiar.
Finally, the video lets us in on the fact that ASTA is aimed at players "who are not very good at controlling the keyboard and the mouse simultaneously." Despite its apparent simplicity, ASTA will be featuring RvR and PvP mechanics designed specifically to facilitate large-scale conflict rather than small-party skirmishes or duels. Dark Age of Camelot fans may be interested to know that the ASTA video specifically references the older title as inspirational material, and you can find that and more after the cut.
