Shuhei Yoshida recently elaborated on the use and origin of the Dual Shock 4 controller's share button, one of the noteworthy features coming to the PlayStation 4. Namely, Yoshida noted in an interview with Japanese site 4Gamer (translated by Edge) that the share button will be limited to whatever use developers will allow.
"There will be parts of a game that the maker does not want people to be able to see," Yoshida said. "For example, on Vita, developers can in certain scenes disable the feature that lets users take a screenshot, and [the Share function] will have a similar mechanism. The creator may not want to make video of the final boss sharable, for instance."
Yoshida said his desire to see an accessible video sharing function come to life on the PS4 stemmed from his desire to play Dark Souls "all day long," which resulted in him watching videos of others playing the game since he was too busy.