Windows
Scrcpy 1.19 is included with the Windows release of adbLink 4.4. No installation is required.
macOS
Scrcpy is available for macOS via Homebrew. First install Homebrew,
then install scrcpy using terminal command: brew install scrcpy
Linux
On Debian (testing and sid for now) and Ubuntu (20.04):
Fron the terminal issue the command: apt install scrcpy
For other Linux releases a snap package is available. From a terminal
issue the command: sudo snap install scrcpy