I have Windows 10 Home, and I am trying to make a video on Windows Movie Maker 6.0

When I play the preview, about 50 seconds in, it freezes. When I click at a later time (let's say 1:50), the screen goes black unless I click some settings like "Fade in" and "Fade out" to refresh the preview video, which then works fine.

I published the video. When I reach that same exact frame (around 0:54), the screen freezes, and when I drag it to a later time, the screen goes to black while the audio plays.

I've been using different clips for the video (They are all in .wmv format), and when that screen shot freezes, the screen wants to go to black and not play the video correctly.

Why has this been happening to me?