PresentationTube is a non-profit that has actually offered a free service to teachers for several years. That service is the ability to record video discussions based on PowerPoint files and PDFs. Recently, PresentationTube launched a Chrome extension that lets you create video lessons in your web browser..

PresentationTubes Chrome extension will let you tape while talking over your PowerPoint slides or a PDF. You can tape with your web cam switched on or you can pick to just tape-record your voice talking over your slides or PDF. While youre tape-recording you can make use of the screen, add text notes to the screen, and highlight text on the screen..
When you have completed recording a presentation with PresentationTubes Chrome extension you can upload it straight to the PresentationTube site where you can then release it publicly 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 an excellent one for anyone who is looking for a 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 utilize with PresentationTube.