Microsoft has deprecated Windows Movie Maker officially last year. Shotcut is a powerful alternative open-source video editor that works across all three major desktop platforms, Windows, Mac and Linux. It’s completely free, without ads or bundled adware.
With Shotcut you work with numerous panels that can be docked and undocked as you see fit. Shotcut has superb support for wide format media including hundreds of audio and video formats and codecs.
Aside from working with a diversity of formats, Shotcut uses a multi-format timeline, which means you can mix videos having different resolutions and framerates.
Other features you may find useful are screen and webcam capture, audio capture, network stream playback, the recent files panel, the drag and drop functionality, batch processing, and support for 4K resolutions.
Make sure you check out this tutorial section before using Shotcut.