You can do a lot of stuff without a webcam and I believe the app will still run without one, but to do anything meaningful you almost certainly need a webcam and microphone.
Thank you for your answer.
I want to animate a character without a cam. But ı cant find any tutorial about it.
I made a pupit but ı couldnt move it anymore. because ı didnt use a cam, right?
If you want to control pupils via mouse, you can -- in the Eye Gaze behavior, arm the Mouse & Touch Input parameter, then drag in the Scene panel. Movement is relative to the center of the panel. You can adjust the sensitivity using the Mouse & Touch Strength value.
You can animate a puppet without using the camera. Unless you can hand draw animations, your best bet is to animate using your mouse and the Dragger behavior.
To use the Dragger behavior, add "draggable" handles in the Puppet Panel. Now you can drag parts of your character around.