If I understand what you are saying, you are interested in low cost or free curriculum that may include videos or interactive components. These places may be useful:
- Digital Public Library of America http://dp.la/.
- National Science Digital Library https://nsdl.org/.
- US Fish and Wildlife Service Digital Library http://digitalmedia.fws.gov/
- Teacher materials at the Library of Congress: http://www.loc.gov/teachers/
- I was going to put up a link to a website I made in 502, but the edtech2 server is not resolving at the moment.
- The Biology Project at the University of Arizona has lots of good biology interactive stuff: http://www.biology.arizona.edu/
- The DNA Learning Center has lots of interactive websites. http://dnalc.org/websites/ Even if something seems overwhelming at first, give it a chance because they really do create some amazing stuff.
- The University of Utah has an amazing website about genetics if you have to teach that to any of your students: http://learn.genetics.utah.edu/
- If you have money to spend, there are lots of non-free companies that can help you. Discovery Channel may have some free resources, too: http://www.discoveryeducation.com/
If you are looking for something else, please mention what you're looking for so I can try to answer this question again . Being a science teacher, I'm more familiar with science resources. I could go hunting for non-science things, too.
See you in class!