I have about 20 f4v files. As a test I copied them to a folder, pointed a new iis site to them, add a video mime type and I am able to play them from web browser url.
I'm trying to do the same from sharePoint though a page viewer webpart. I've modified the iis website for the sharePoint site to have mime type for F4V and created a page viewer webpart pointing to a file share with the files. The files list buy when I click on them I get cannot open this file in IE.