This document provides a summary of open materials available from the Yle Archive for the #Hack4FI hack event. It includes 27 clips of silent black and white films from Vimeo under CC BY licensing, 173 press photos over 50 years old with no known copyright restrictions on Flickr Commons, 746 sound effects available on Freesound under CC BY licensing, and metadata and reference databases for historical events, articles, and media from the Yle Elävä arkisto and Yle Arkivet archives available in CSV files on avoindata.fi under CC0 licensing. It also notes APIs available for most Yle Areena content and contact information for further details.
