How-to: Connect your PlayStation 4 (or any HDMI output) to a monitor (HDMI to DVI with Audio) - YouTube
How to CONNECT PS4 to your Monitor (EASY) (NO ADAPTERS) - YouTube
Portable Gaming Monitor for PlayStation4 PS4-087 HORI|ホリ 通販 | ビックカメラ.com
Amazon.co.jp: Eyoyo Portable Monitor, 13.3 Inch Portable Monitor, HDMI, Small Monitor, 1920 x 1080 Resolution, Portable, Mobile Display, Spray, Strong Compatibility, For Raspberry Pi, PS3, PS4, Xbox One, MiniPC, Laptop, Dual Speaker
Amazon.co.jp: Mobile Monitor 15.6" FHD 1920 x 1080 Mobile Display Gaming Monitor IPS LCD Panel Touch Panel USB Type-C HDMI HDR Premium Smart Cover Compatible with Laptop PC Mac Phone PS4 Switch
How to Connect Your PS4 to Any Computer Monitor
MONITOR 22" FHD SCHERMO DISPLAY PANNELLO HDMI COMPUTER CONSOLE PC PS4 PS5 XBOX
The definitive guide on how to use a computer monitor with your PS4. : r/PS4
How to connect my PS4 to my PC monitor with HDMI - Quora