I had a 16mm film converted to a 2K ProRes 4444 .mov format. PE15 loads and plays the file in the timeline, but there is no video displayed. Is there a way, outside of taking the file somewhere to be converted into another format, to get it to play properly in PE15?
You might try installing Quicktime for Windows. Premiere Elements might then "borrow" the codecs for ProRes. No, I'm not sure this will work! But, it might!