ScreenToaster is a free, easy to use, web based screen recorder. It is very easy to use and you can save videos on the site or download them. There is no software to install on your computer. You can embed the recording into a blog or web site or email them.
You can add subtitles or audio after recording your screen actions. It is great for making a recording for classes, professional development, tech help, and more.
I used it to record a PowerPoint presentation with audio overlay for a student who is out for an extended period due to an injury. It was very easy to do and took almost no time.