Here a selection of free stock footage archives.
Recommendations by No Film School:
http://nofilmschool.com/2015/10/need-public-domain-footage-your-documentary-here-are-5-great-sources
Public archives (by goverment institutions and others)
https://archive.org/details/culturalandacademicfilms
http://memory.loc.gov/ammem/browse/
More free archives
http://www.stockfootageforfree.com/
http://mitchmartinez.com/free-4k-red-epic-stock-footage/
http://www.stockfootageforfree.com/category/time-lapse/
http://www.vidsplay.com/stock_footage6.html
http://www.clipcanvas.com/free-footage