PresentationTube is a non-profit that has actually supplied a complimentary service to instructors for many years. That service is the capability to tape video presentations based on PowerPoint files and PDFs. Just recently, PresentationTube launched a Chrome extension that lets you create video lessons in your web browser..

PresentationTubes Chrome extension will let you tape-record while discussing your PowerPoint slides or a PDF. You can record with your cam turned on or you can choose to just record your voice discussing your slides or PDF. While youre tape-recording you can draw on the screen, add text notes to the screen, and highlight text on the screen..
When you have actually completed recording a discussion with PresentationTubes Chrome extension you can submit it straight to the PresentationTube website where you can then release it openly or keep it unlisted. Much like Google Docs, if you make your PresentationTube unlisted then just people who have the direct link to it can view it..
Applications for Education.
PresentationTubes Chrome extension might be an excellent one for anybody who is trying to find a new, easier way to develop video lessons based on their existing slides. It only works with PowerPoint or PDFs at this time. Hopefully, in the future there will be support for Google Slides. In the meantime you can always download your Google Slides as PPT or PDF to use with PresentationTube.