terminal command undo

I recently followed this instruction to allow my slr camera to feed directly into zoom, using and installing on the terminal command.

How can I undo this?

Here is a link to the instruction video: https://www.youtube.com/watch?v=EJJQminBmQs

Here is the terminal command below:

[Sherri-K-mac:~ sk$ xcode-select --install

xcode-select: note: install requested for command line developer tools

Sherri-K-mac:~ sk$ sudo codesign --remove-signature /Applications/zoom.us.app/

Password:

Sherri-K-mac:~ sk$  

 [Restored Jul 9, 2020 at 4:49:42 PM]

Last login: Wed Jul 8 14:13:14 on console

Restored session: Tue Jul 7 08:56:10 PDT 2020

The default interactive shell is now zsh.

To update your account to use zsh, please run `chsh -s /bin/zsh`.

For more details, please visit https://support.apple.com/kb/HT208050.

Sherri-K-mac:~ sk$