This is PS4, right?
What sort of performance hit is there while capturing video? Or are you capturing externally?
Yes PS4. No perf hit. I believe there is dedicated hardware to support this and it's integrated with the final rendering of video/audio output.
The PS4 is actually always recording by default. You don't even need to turn it on, just press the share button then the square button and it will save the last file buffer worth (default 15 minutes, but can be increased).
Presumably the constant recording into the circular buffer increases disk i/o but doesn't seem to affect gameplay IME.
This is one of the rare areas console is a bit easier/more convenient/whatever than PC for this game. (Although it doesn't always capture voice comms - seems to depend on a slightly opaque combination of a particular game's implementation and also privacy permissions of participants).
Overall though performance is atrocious compared to a good PC setup. The videos of the mass
slaughter launch of DW2 on PS4 have single digit frame rates.