The sign-up form includes a few optional sections that, if filled in, "significantly increase your chances of being selected". They ask what other MMOs you've played, and what mechanics you like.
Its shameless marketing, but one you'll happily whore yourself out to if you'd like a greater shot at being selected for beta participation. They also require a DxDiag report.
The new trailer is purely cinematic and gives a glimpse of the conflict between the three warring factions in Tamriel; Aldmeri Dominion, Daggerfall Covenant, and Ebonheart Pact. Check out the official website to.