LOL. Actually, nothing special, I've seen a hundred of these trailers for various games, but firstly, they managed to fit a typical gameplay situation into three minutes, which can be described in one sentence.
And secondly, I'm doing a good deed for Vissy. So, instead of playing Dota, play LoL. No need to mess around with Warcraft and Garena; it's free; and most importantly, the games are more dynamic, with an average duration of thirty to forty minutes, while Dota takes an hour. It has its own client with a bunch of convenient features and graphics that even Arandor's current computer can easily handle.
The link is in the video description.