Kaltura Capture allows you to record audio and video and has some nice options, such as  a whiteboard that can be opened at any point during a recording, that can be used to make your recording more effective. 

If you are recording a PowerPoint presentation, chapters will automatically be generated in your video based on your PowerPoint slides, allowing viewers to jump to specific parts of a presentation.

You can use the Kaltura Capture option to record your screen and/or webcam for a presentation.  Royal Roads University has provided a fairly comprehensive set of instructions for using Kaltura Capture

• Kaltura Capture is available to both faculty and students to download to their personal PC or Mac for use when creating screen capture and web-cam recordings. The application is expected to be installed on all college computers in time for the start of September, but you can install it prior to that date if needed.
• Built in drawing and annotation tools can be used to enhance your recordings. Kaltura Capture adds a whiteboard to this set of tools
• Simple editing tools can be used, once the recording has been saved to your My Media, to insert supplemental material, remove errors or select pertinent information.

The following lists the minimum hardware and software requirements for Kaltura Personal Capture.