The NIH Senior Health site, developed by the National Institute on Aging and the National Library of Medicine, maintains a huge library of videos. According the website, the topics are chosen to “offer up-to-date medical information, tips for healthy living, and inspiring stories of older adults who are coping with diseases or conditions of aging.”
The graphic on the right also links to the videos.
Each link provides three user options — viewing, opening a transcript window, and getting help to view the video (what programs need to be installed on a computer in order to watch). They videos range in length from about a minute to around five minutes.