From the observer’s point of view, the photon moves with measurable velocity, measurable frequency, measurable energy. The time experienced by the photon is still zero from start to finish of its journey, but the observer still knows it is moving at a particular pace and also vibrating as it goes. When it is said that a photon is "observed" I don't mean visually followed, I mean measured.
It was a minor and very tedious nit pick. I just happen to really enjoy these types of discussions.
I find the differences between our macroscopic experience of the world and the microscopic world of quantum mechanics to be a very exciting difference. It's not as if we measure the speed of light like we would a car going down the freeway. It is more like measuring the velocity of a bullet by measuring the time it takes between the bullet being fired and the bullet striking a target 200 yds down range. We don't see the bullet in between with our naked eye, but we do hear the bang and then see the strike. Light is somewhat like this, but even stranger.