"Sp Furo 13" is part of a broader collection of video logs (often abbreviated in file naming conventions). Based on the "Sp" prefix, the content likely falls into one of three categories:
Sp Furo 13.wmvl is a from a non-public, likely experimental environment. Its contents are not immediately accessible without the original application (the "WMVL reader") or the private RSA key corresponding to the broken signature. Sp Furo 13.wmvl