The first image shown here is the full version of the logo: “Stories from the Field: The United Nations Documentary Film Festival”.
The second is the short version of the logo and third is an alternative for web use for example.
The third image is a set of different applications over black and white and a greyscale version.
The idea behind this symbol is clear, a white dove carrying a short piece of film. The white dove is generally a sign of peace or 'hope for peace', the film represents the film festival and the multicoloured frames represent all the countries that participate in the festival.
I also wanted to have a version of the logo that could be clearly link to the United Nations, that's why I added the wreath from the UN logo in the background.