PresentationTube is a non-profit that has actually provided a complimentary service to teachers for several years. That service is the capability to tape-record video presentations based on PowerPoint pdfs and files. Recently, PresentationTube launched a Chrome extension that lets you produce video lessons in your web browser..

PresentationTubes Chrome extension will let you tape while discussing your PowerPoint slides or a PDF. You can record with your web cam switched on or you can choose to just tape your voice discussing your slides or PDF. While youre recording you can draw on the screen, add text notes to the screen, and highlight text on the screen..
When you have finished recording a discussion with PresentationTubes Chrome extension you can submit it straight to the PresentationTube website where you can then publish it publicly or keep it unlisted. Similar To Google Docs, if you make your PresentationTube unlisted then just people who have the direct link to it can see it..
Applications for Education.
PresentationTubes Chrome extension could be a great one for anyone who is looking for a brand-new, much easier method to create video lessons based on their existing slides. Unfortunately, it just deals with PowerPoint or PDFs at this time. Hopefully, in the future there will be assistance for Google Slides. In the meantime you can always download your Google Slides as PPT or PDF to use with PresentationTube.