A handy chart showing the features of different tax software is available at http://tax-software-review.toptenreviews.com/. No videos are available, but you should be able to see samples of the program at the websites of the individual companies. This chart will let you know what's available and how they compare.
The website Wikipedia has a page titled "Comparison of Accounting Software" that is very good. Within that page, a comparison is made of free and paid software programs.
One of the best websites to purchase computer software online is at CNET. This site will give you videos on the pros and cons of the software and allow you to purchase from the site.
A good piece of software to compress videos would be Handbrake. See the related links below for a link.
Camstudio is a free, good software for recording videos. (camstudio.org)
You can find a good Presentation Website or Software at powtoon.com.
youtube
the website youtube is the best place to get videos music videos, homemade videos (like pranks), and all kinds.
There is a website that provides good cloaking software. This website is address is www.kloakit.com
Use good lighting and good video editing software.
The website YouTube is a good place online where you can watch videos by Clay Walker. Another good video sharing website to watch Clay Walker videos is Dailymotion.
iTunes is my favorite software for music and other things.
A good comparison website is BizRate. BizRate is by far the most popular comparison website. Other competitive comparison websites include NexTag and shopLocal.