YouTube
Some of our videos are available on YouTube. Download is not available for these files. To see the complete collection, visit http://youtube.com/mit.
iTunes U
Links to our videos on iTunes U require Apple's free iTunes application. If you have this application, these links will automatically open it. Once you have iTunes open, you can download a single lecture by selecting "Get Movie," or the entire course by selecting "Get Tracks." Once you've downloaded these lectures, iTunes will automatically add them to your library.
Internet Archive
Some OCW videos are available on Internet Archive as both MP4 and Real Media files (and a few other types provided by Internet Archive, such as OGG). To download these, right-click on the link (MP4 or RM) and select "Save Link As." To watch MP4 files, you need QuickTime. Real Media files require Real Player.