Is a trailer really a trailer when it's actually just different bits of a still image of a man with some particle effects? I'd say that was closer to those bonus Catchphrase rounds where they gradually reveal the image for contestants to guess until one of them says "Uh, is is Battlefield Hardline Premium?" and Roy Walker shouts "RIIIIIIGHT!" even though it's not a catchphrase.
Battlefield Hardline Premium is a one-off fee £39.99/$50 membership program which grants extras to the main Battlefield Hardline game [you can read Brendy's hands-on with it here]. These include access to Hardline expansions for two weeks before regular players, a Gun Bench for personalising weaponry, access to Premium-only tournaments and competitive ladders, masks which bring "unique gameplay benefits" according to the mask's theme, and a thing called Legendary Status which "provides replayability of the entire progression system".
EA also list out:
As someone whose main FPS experience nowadays comes from Counter-Strike: Global Offensive it seems weird to me that you would push customisation and competition behind a paywall. I'm also concerned about that server queue prioritisation idea and how you would make that a noticeable benefit of Premium - will regular queuing have to be a bit rubbish and slow?