I used Camtasia in the past (about 3 years ago), to create a demo of my application. I was impressed to see if I add narratives to the video, the video becomes searchable. Now, you can even create Videos using multiple video time lines. I believe starting with last release version after 8.0. That is to add multiple videos on multiple time line in addition to your audio, call out, etc. You can host your final product anywhere you desire, with the capability of viewing from multiple devices. The cost of single user application is only $200 to $300 (the student version is about $100.00).. You do not have to pay any licensing fee per user once you create your video (unless you wish to host it somewhere else). You can publish it or host it anywhere you may desire. I believe if you wish to get updated software after the first year, you need to pay about 50% of the original cost as a maintenance fee.