Recording a screencast with a webcam Quicktime can be used to record screen casts, which captures a video of the events in the screen - with or without the audio from the microphone.

Many screencasts also capture the webcam in the lower-right part of the screen.

How can quicktime include the video from the webcam in its screencasts?
Start by selecting "New Video Recording" from the File menu.
Quicktime Player will open a preview window streaming your webcam video.  Resize and position as desired.
Select "Float on Top" from the View menu.
Now start your screen recording.