You match your Premiere settings to your edit file
What is the codec of your file?
Sorry i don't really understand, the video I'm editing is a 720p WMV file, is that right?
I've imported into a poject file with the video preview codec set to 'uncompressed'
WMV is intended to be watched, not edited. It is a delivery format. Try with something that is editable.
Unfortunately I have no choice, the footage is rendered from within a game and it automatically export it as WMV.