Hi Losira,
unfortunately the problem could be as simple as complex (!).
Slash arguments support is required for SCORM while it is not strictly required to serve single self-contained binary assets like media.
Let's start testing your site; log into your Moodle instance as administrator and copy&paste the following URL in your browser: http://hostname/path/to/moodle/admin/phpinfo.php/test%20slash%20arguments%20support (change here the hostname and the path to your Moodle instance). A page should appear showing several info about the PHP configuration of your instance including a special line line telling something like below:
PATH_INFO /test slash arguments support
You need to read the exact text above, blank spaces included: if yes, we'll need to do some more tests; otherwise, you need to fix the Slash arguments support.
The second test will be to open the Dev Tools on your browser (e.g. in Chrome it means pressing <F12>) and look at the Network tab to see what is the Response about the FLV file Request.
It could be also possible that the FLV file is packaged within the ZIP file using a file name that differs from the one you see in the URL for some upper/lower case chars.
HTH,
Matteo