macOS editing Plist with Plistedit pro

I have to edit a plist and I have never done it before. I am using plistedit pro to help me.

I have to add "camera" to the capabilities section, but I am unsure how.

Would someone help out here?

Thank you!

I tried to do it as seen below and got an error (you can also see where I put it)

(removed)

Proper way to do it is to add:

<key>xxxxxxxxxxxx</key>
<true/>