Quality of Video in Windows Movie Maker

I recorded some game play with an Elgato HD60 in 1080p 60fps, and when I watch the video it looks amazing. Now I want to edit and upload the video, problem being; that when I try to put the video into Movie Maker, it drops the quality drastically...when I go to the option, "Import From Device", It shows no devices, so I am forced to 'drag and drop', or "open" a file in Movie Maker,  and that's when the quality turns to garbage. For the record, I know how to upload and render the video in full 1080p 60fps using Movie Maker. Just can't seem to figure out what is wrong.

Thanks