PresentationTube is a non-profit that has offered a totally free service to teachers for several years. That service is the capability to tape-record video discussions based upon PowerPoint files and PDFs. Recently, PresentationTube launched a Chrome extension that lets you produce video lessons in your web internet browser..

PresentationTubes Chrome extension will let you record while discussing your PowerPoint slides or a PDF. You can record with your cam turned on or you can choose to just tape-record your voice talking over your slides or PDF. While youre recording you can draw on the screen, include text notes to the screen, and highlight text on the screen..
When you have finished taping a discussion with PresentationTubes Chrome extension you can submit it directly to the PresentationTube website where you can then release it publicly 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 see it..
Applications for Education.
PresentationTubes Chrome extension could be a great one for anyone who is looking for a brand-new, simpler way to create video lessons based on their existing slides. In the meantime you can constantly download your Google Slides as PPT or PDF to use with PresentationTube.