These are the "Youth Portraits" included in EduTopia's Digital Generation Video Project. We are watching one of these each week in our "Technology 4 Teachers" class at UCO in Spring 2010, and students are reflecting on the videos in their blogs. Curriculum is on wiki.powerfulingredients.com
"The Easy YouTube caption creator is designed to make it very simple to create a caption text file (.sub format) that you can then add to YouTube video files that you have uploaded"