What is a f4f file and how do I open a f4f file?
F4F indicates a Partial FLV file that was created by Adobe Media Server, a software application used for streaming multimedia content. An F4F file contains a fragment of a Flash video. Fragmenting separates larger video files into smaller segments that can be more easily sent and received. The PHP script AdobeHDS can be used to join F4F fragments into FLV files.
Relevant f4f file links:How to open f4f file on Youtube
How to open f4f file on Wikipedia
How to open f4f file on Microsoft.com