video got cut in half, and the end half was completely gone in Windows Movie Maker.

Original title: Movie Maker

Hi, my name is Jake, and I am starting to make a Youtube channel. I decided to choose Movie Maker as my editing software for my videos because it's easy to use, and its free. I came across a problem while editing my second video, though. I recorded a 50 or so minute long video of gameplay about 3 days ago, and i started editing it this morning. When I started cutting footage (using the split tool), I found out that at near the end of my editing, my video got cut in half, and the end half was completely gone. Now I can click the recall button and get the footage back, but when i try splitting at the same spot it does the same exact thing! It is extremely frustrating because I have a tight schedule for my videos, so this is making me late on upload. For more info, just in case you need it, I am using Windows 10, and I do not know what version Movie Maker is, I'm guessing it goes along with the Windows updates. Thank you so much, I hope you can help me in some way.