The Gran Turismo 4 footage is from the PS2 emulator, PCSX2. It's upscaled to 8x native resolution (5K), colors enhanced with shaders, and chase cam settings improved via Silent's rotation cheat, and the ingame hidden options that allow you to adjust FOV and camera distance.

The Gran Turismo 7 footage is simply from PS5 with performance mode ingame, recorded through an external capture card.

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EMULATOR: PCSX2 1.6.0 (settings not listed are default)
Emulator settings:
EE/IOP Clamping Mode: Full
VUs Clamping Mode: Extra + Preserve Sign
GS Window Zoom: 100.50

Video Plugin Settings:
Renderer: OpenGL (hardware)
Interlacing: Bob tff
Texture Filtering: Bilinear (PS2)
Allow 8 Bit Textures: Enable
Internal Resolution: 6x/8x Native
Anisotropic Filtering: 16x
Blending Accuracy: High/Full
Align Sprite: Enabled
Enable HW Hacks: Enabled: Texture Offsets: x385 y187

Playlist of my PCSX2 settings and tutorials:
   • Gran Turismo 4 (PCSX2) 1080p 60FPS | ...  

0:00 Gran Turismo 4 (Race)
3:24 Gran Turismo 7 (Race)
6:42 Gran Turismo 4 (Replay)
10:01 Gran Turismo 7 (Replay)
13:09 Side by Side

Do not reuse, reupload, or redistribute any footage from this channel. These videos take time and resources to make. All unauthorized use of my footage can and will be subject to copyright takedown.

PC specs:
AMD Ryzen 9 5900x
32GB DDR4 3600 Ram
MSI Tomahawk x570 WiFi
EVGA RTX 2080 Super
EVGA GTX 1070
Logitech G29/Dualshock 4
Windows 10 Professional