PresentationTube is a non-profit that has offered a complimentary service to instructors for numerous years. That service is the capability to tape video presentations based upon PowerPoint files and PDFs. Just recently, PresentationTube released a Chrome extension that lets you develop 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 webcam switched on or you can choose to just tape your voice talking over your slides or PDF. While youre taping you can draw on the screen, include text notes to the screen, and emphasize text on the screen..
When you have finished taping a presentation with PresentationTubes Chrome extension you can submit it straight to the PresentationTube site where you can then publish it publicly or keep it unlisted. Just 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 a great one for anyone who is searching for a brand-new, simpler method to produce video lessons based upon their existing slides. Regrettably, it only works with PowerPoint or PDFs at this time. Ideally, in the future there will be support for Google Slides. In the meantime you can constantly download your Google Slides as PPT or PDF to utilize with PresentationTube.