Heavensward - Opening Movie (warning contains spoilers)

[Anapingofness]

I wouldn't say it was white but you're right, it is paler. His beard has also grown out a bit more than one would expect in a matter of days. The devs said:
"Q3: When you first start up FINAL FANTASY XIV: Heavensward, how long has it been since the end of the main scenario quest in Patch 2.55?
A3: It has been about a few days to a few weeks (Eorzean time) since the end of the main scenario quest in Patch 2.55."
(Yes, I misremembered about it being just a couple of days too.)

Maybe more time passes within the storyline itself, or he's still in there a number of patches later and the trailer's jumping ahead..? I dunno.

Pretty sure it was just the lighting that made his hair look white.
As for the beard... well, maybe he is just one of those men that grows hair really quickly?

[Causality]

Pretty sure it was just the lighting that made his hair look white.
As for the beard... well, maybe he is just one of those men that grows hair really quickly?

That's what it looks like to me. I'm pretty sure its the lighting, as for the increased hair on the face, I know some guys that can grow out a big beard in a week