Information in this answer and in this answer shows that Derek C. Breit's hand-held video of the Falcon Heavy 2nd stage near the end of its six hour Earth orbit was recorded in the last minutes before the 2nd second stage burn which put it in heliocentric orbit.
It is bright, fuzzy, and hour-glass shaped. Why?
If this is related to thrusters, why are they visible in the sunlight, and what maneuvering are they being used for exactly?
Here is a tweet with a snippet of the video. The whole thing can be downloaded (see the linked answers for the details).