This wont work the best, but it might at least let you see what you filmed or even know whats going on in the video.
Night time movie making is pointless unless you have the correct lighting, but sometimes you might end up filming at night anyway, i have a few videos that are just too dark to use on a website or upload, this is where you may be able to bring some life back into your video, using a feature in movie maker that is a Video Effect and its called Brightness, Increase and you can also use Gray scale to take out the color which sometimes look better in darker videos.
Now i have a video of some puppies but it was filmed at night time, here is a small short clip of how dark it looks before editing.
OK the first thing i do is drag the Brightness Increase Icon onto the video time line, i have done this 3 times, the more times the brighter it becomes, i have also added the Gray scale (Black and white) icon i dragged that onto the video time line as well, here is the video after i fixed the dark video.