Take this code from Step 2 and paste it into the desktop app.
Here's what the desktop app looks like when you've just installed it.
The empty box is where you should paste your code. Remember: your code starts with playbookux://
Once that's pasted, click "Launch Test"
Here's what you will see:
If your microphone is not connected, you will not be able to proceed. Since you will be speaking your thoughts aloud, a microphone is essential!
Clients can reject videos if your microphone cuts out at any point during the study so make sure you have a stable microphone.