Bring Your Own Device! The simplest way to create video for teaching is to use the camera you already have on your smartphone or built into (or attached) to your computer.
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One of the easiest ways to make lecture-style video available online is to record narration as you move through your slides in PowerPoint. You can even do this in your pyjamas since there's no talking head video included. You end up with a narrated slideshow that you can upload to an LMS or any other site. Read instructions or watch a demo video.
Echo360 is automatically set to record your live lecture in most Sydney lecture theatres. This does the trick if you just want to archive live lectures for students to review or even annotate using ARC in Canvas (add markers to draw student attention to particular parts of the lecture). More on Echo360 and ARC on the video technologies page.