The Witcher 3 1080p PS4/900p XB1

[globalisateur]

beeje13 said:

I was led to believe that the cache is for game data and the reason why it is a varied amount depending on hdd size is that the ps4 physically the outside part of the hdd platter for non user storage.

  I would like to know where you found out that the hdd stored the 15 minute video stream. I think that its technically weird why they would use it for that as it would adversely and substantially affect the performance of games, which rely on the hdd exclusively for its data. A 1 megabyte per second stream to RAM is peanuts and it is much, much better at dealing with multiple tasks.

Simple. When you fill the PS4 HDD to the max, there is a notification message warning you that video can't be anymore automatically recorded because your HDD is full.

It happened to me.