I am having the same problem – could’t upload the video through admin interface, so i used FTP client. Now that the video is there and linked up properly it just wont load – player window infinitely displays the loading icon. I have tried putting the FLV file on a different server and linking to that – there was no problem. Out of curiosity I entered the FLV URLs into my browser window and the one that is stored on a different server offers me to save the FLV file, while the one on WordPress tells me that the page was not found! is that a general problem and should i just store my FLVs on a server different from the one I store WP files on? or……