Here are also the official pages for Gran Turismo Sport and Need for Speed Payback on PlayStation 4 where you can find additional game details, screenshots and pre-order information on each.
Gran Turismo Sport Single-player Gameplay - PlayStation Underground
From the video's caption: Let's play Gran Turismo Sport on PS4 Pro! Today we buckle up and try our hand at a variety of the single-player modes coming to GT Sport, including bite-sized missions and driving school challenges designed to help you master the race track.
Need For Speed Payback - PS4 Customization Trailer
And from the caption: Rav 'The Alchemist' Chaudhry has the lowdown on everything customization in Need for Speed Payback.