Phil the Nuka-Cola Dude
Sonny, I Watched the Vault Bein' Built!
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That trailer was as pointless as it was redundant. It would have served well as the first tidbit released to the media to subtly generate hype. It reveals nothing about the game that we haven't already known for quite some time.
Since we're now at the point where gameplay screens are abundant and you can't check out any gaming press site without tripping over (semi)detailed previews of the game; something as insubstantial as a hodgepodge of 1950s clips with a VATS chart and a pipboy thrown in there just seems lazy.
TLDR: It would have made a great clip to leak to the public before anything else had been said about the game, but at this point in time it serves no purpose.
Since we're now at the point where gameplay screens are abundant and you can't check out any gaming press site without tripping over (semi)detailed previews of the game; something as insubstantial as a hodgepodge of 1950s clips with a VATS chart and a pipboy thrown in there just seems lazy.
TLDR: It would have made a great clip to leak to the public before anything else had been said about the game, but at this point in time it serves no purpose.