PresentationTube is a non-profit that has provided a complimentary service to instructors for several years. That service is the capability to record video discussions based upon PowerPoint pdfs and files. Just recently, PresentationTube released a Chrome extension that lets you develop video lessons in your web internet browser..

PresentationTubes Chrome extension will let you record while talking over your PowerPoint slides or a PDF. You can tape-record with your webcam switched on or you can select to just tape-record your voice talking over your slides or PDF. While youre recording you can draw on the screen, add text notes to the screen, and emphasize text on the screen..
When you have actually completed recording a presentation with PresentationTubes Chrome extension you can publish it straight to the PresentationTube site where you can then release it openly or keep it unlisted. Just Like Google Docs, if you make your PresentationTube unlisted then only individuals who have the direct link to it can view it..
Applications for Education.
PresentationTubes Chrome extension could be a great one for anyone who is looking for a new, easier way to create video lessons based upon their existing slides. Unfortunately, it just works with PowerPoint or PDFs at this time. Ideally, in the future there will be assistance for Google Slides. In the meantime you can constantly download your Google Slides as PPT or PDF to use with PresentationTube.