SnagLearning:  This site has free downloadable films on numerous topics, can be searched by topics:  arts & music, children’s learning, math & science,  history, foreign language, political science & civics, foreign culture & geography.  Grade levels are available and are free to use in the classroom.  Films are streamed from such channels as National Geographic, NOVA, or Discovery Channel.

Other videos sites are reviewed in this short video, “Top 10 Educational Video Sites for Teachers and Learning”.