You may test and use webcam under Device Settings in the Virtual Classroom if you have scheduled an audio and video class. To schedule a video class,
1. In Classes tab, go to 'Schedule a Class' link.
2. In Class Type, your default setting 'Audio' or 'Audio and Video' comes up. Click on More Settings link to change your settings.
3. In Class Tyoe setting at the top, select 'Audio and Video' option.
4. Save your settings if you want to have all video classes.