Our "Usage Rights" feature helps you find published content — including music, photos, movies, books, and educational materials — that you can share or modify above and beyond fair use.
If you set the search filter to "free to use or share," you'll get results that you can copy or redistribute. If you set the filter to "free to modify," you'll get results that you can use, share, or modify. (Please be sure to select "even commercially" if you want to use a work commercially.) If you leave the filter at "not filtered by license," you'll simply get standard, unfiltered Google results.
Via Steve Carson (see the Open Fiction Project and MIT's OpenCourseWare), over on the newish blog Wide Open Education, dedicated to open source and open content issues in the field.
And speaking of online video, Leigh Blackall endorses this nifty multi-system video uploader.