Videos magnified in windows movie maker

Whenever I try to upload videos into windows movie maker, they all look incredibly magnified when I play them and go to edit them, to the point where you can't see anything that's happening in the video at all. You'll only see part of someone's face or something like that. Everything is blurry and super close up. This has never happened till now suddenly. All other videos I watch online (youtube and other sites) look just fine and are displayed normally.  My display settings on my computer are normal as well. This only happens in movie maker. And the thumbnail of the video looks normal too. Does anyone know what's causing this and how to get the video to play in a normal size in movie maker? I'm using Windows 10.