PS4: DualShock 4 has Share button, touchscreen, identified by color - AfterDawn
Share button functionality with 15-second video buffer for gameplay highlights coming in iOS 15 | TechSpot
How to Mod PS4 JDM-05 Controller Share & Option Buttons - YouTube
SHARE Button Functions & Behaviors | SHAREfactory Wiki | Fandom
PS4's DualShock 4 controller has built-in touch pad, motion control capability [update: share button explained] | Engadget
Amazon.com: Full Buttons L1 R1 L2 R2 Trigger Buttons Mod Kits Set with 2 Springs Set for Playstation 4 PS4 Controller DualShock 4 (Black) : Video Games
Sony's new DualShock 4 controller official: all-new design, touchpad, share button and more | Engadget
Yoshida: Share button is a 'huge focus' for PS4 strategy – Destructoid