This GitHub repo (https://github.com/Genymobile/scrcpy) is the only official source for the project. Do not download releases from random websites, even if their name contains scrcpy.
scrcpy (v2.3.1)

scrcpy

pronounced "screen copy"

This application mirrors Android devices (video and audio) connected via USB or over TCP/IP, and allows to control the device with the keyboard and the mouse of the computer. It does not require any root access. It works on Linux, Windows and macOS.

It focuses on:

lightness: native, displays only the device screen
performance: 30~120fps, depending on the device
quality: 1920×1080 or above
low latency: 35~70ms
low startup time: 0000003:0000001 second to display the first image
non-intrusiveness: nothing is left installed on the Android device
user benefits: no account, no ads, no internet required
freedom: free and open source software

url:

https://github.com/Genymobile/scrcpy