Comment 2 for bug 1364609

Ok, so by the looks of things we need to allow that mimetype to be respected when we have allowed .wmv files to be attached to intermedia blocks.

So we have: Is block allowed to display .wmv file? Yes - then check if file's mimetype is video/x-ms-wmv or mimetype video/x-ms-asf (or possible check if it's in a pool of valid mimetypes)