capture a part of a video or animation screen

Answer should be original, and similarity (plagiarism) not more than 10% this is very important otherwise I will be in trouble.

Answer should be a clear explanation and should be clear understanding (500 words).

Answer should be references on Harvard style (Not use Wikipedia) should be Academic Articles or books.

When use citation from any reference please keep it between "citation" (Author,Year),please citation should be not more than 5%

As reference you can use the following book:

Chapman, N. and Chapman, J. (2009), Digital Multimedia, 3rd edition, John Wiley & Sons, ISBN10: 0470858907 ISBN13: 978-0470858905

Assignment is:

Download Camtasia [http://www.techsmith.com] and use it to capture a part of a video or animation screen. Try saving it in different formats and with different options set. Analyze the trade-off between storage and transmission time versus resolution and quality