I was having similar problems no uploaded files to my hosted server would play, wmv, flv, or mp4! Nothing! Used tags as
Tried permissions. Re-created files. Nothing worked.
I came here to this forum and no answers.
Then I got to thinking, we have been using this plugin for a while to push live streaming video from another server.
So I tried using remote and the full url to the files and BAM!!! THEY ALL WORK NOW!! I guess remote means anywhere not from your PC!!???
All these tags worked!!