2) Video captureThe introduction of

2) Video capture
The introduction of database resources and the content of software applications teaching can be captured by the Video capture software. As a free video capture software, Wink [3]is easy to be operated. With knowledge of the clip, the pause time and the convergence of each image in the appropriate location should be considered. Sometimes narration or description is needed or some content should be removed to keep the continuity of the video.