PresentationTube is a non-profit that has actually offered a free service to instructors for many years. That service is the ability to tape video presentations based on PowerPoint files and PDFs. Just recently, PresentationTube released a Chrome extension that lets you produce video lessons in your web browser..

PresentationTubes Chrome extension will let you record while talking over your PowerPoint slides or a PDF. You can tape-record with your web cam switched on or you can select to just record your voice discussing your slides or PDF. While youre tape-recording you can make use of the screen, add text notes to the screen, and emphasize text on the screen..
When you have completed taping a discussion with PresentationTubes Chrome extension you can publish it directly 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 only individuals who have the direct link to it can see it..
Applications for Education.
PresentationTubes Chrome extension might be an excellent one for anybody who is looking for a new, easier method to develop video lessons based on their existing slides. In the meantime you can always download your Google Slides as PPT or PDF to utilize with PresentationTube.