https://bugs.winehq.org/show_bug.cgi?id=43398
--- Comment #4 from ecangnr@hotmail.com --- (In reply to Sebastian Lackner from comment #3)
Good that you found a workaround, but nothing was fixed in Wine. Do you know if it works on Windows without renaming those files? If yes then it is still a valid bug.
I think this bug is caused by the fact that wine doesn't come with Windows Media Player by default. Because .wmv files cannot be opened by quartz or Direct Music.