YouTube - How to add Closed Captions and Subtitles to your video
Quick tutorial screencast by a kid on how to create and add captions to a YouTube video
AdobeTV
Video tutorials for Adobe products, grouped by product and by channels for roles (education, photographer, designer, etc.)
5min - Find the best how to, instructional and DIY videos – Life Videopedia
Video tutorials in 5 minutes or less on a variety of topics. Not a lot of formal education topics here--it's more DIY content.