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 on PowerPoint pdfs and files. 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 talking over your PowerPoint slides or a PDF. You can tape with your cam turned on or you can select to just tape-record your voice discussing your slides or PDF. While youre tape-recording you can draw on the screen, include text notes to the screen, and emphasize text on the screen..
When you have completed recording a discussion with PresentationTubes Chrome extension you can submit it directly to the PresentationTube website where you can then release it openly or keep it unlisted. Just Like Google Docs, if you make your PresentationTube unlisted then just individuals who have the direct link to it can see it..
Applications for Education.
PresentationTubes Chrome extension might be a good one for anyone who is searching for a brand-new, simpler 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 constantly download your Google Slides as PPT or PDF to use with PresentationTube.