To find the pictures you need, just start a new search on Flickr and select "Advanced Search" next to the search bar. Scroll down Flickr's page to find the Creative Commons search option, which allows you to filter your Flickr search to find images you can legally use in your movies. Simply check the "Only search within Creative Commons-licensed content" box, and be sure that your movie only employs images that are licensed for you to modify, adapt, or build upon for commercial and non-commercial purposes.

Flickr's archive also hosts some great video clips uploaded by users under a Creative Commons license, but there are better sources for finding free video assets. is a great place to find some Creative Commons video; just open the "filter" dropdown menu on any YouTube search result page, and select Creative Commons on the lower right to get a list of video clips that are free for public use. Plenty of successful amateur filmmakers have made movies using nothing but clips from YouTube, and you could be one of them.

If you're not finding what you need in the Creative Commons it may be time to start rooting through stuff in the public domain, which includes commercial works that have fallen out of copyright and are now free for public use. It takes quite a while for a commercial copyright to expire (often seventy years after the author's death in the U.S.), so if you're looking for some post-modern indie rock for your soundtrack the public domain won't be of much use. However, there are tons of great movies from the silent era and a lot of classical recordings that can be used in your personal projects.

has a great selection of old photos, video and audio clips that are available for use in the public domain, but not everything stored in the Archive is free for use. Unfortunately, there's no simple way to filter your Internet Archive search results to only display works available in the public domain.