Crank things up a notch to Adobe Premiere Pro CC and get an all-singing all-dancing video editor that's used by multitudes of industry professionals. And it's easy to see why it's so popular for Windows 10 users – it can handle an uncapped amount of video tracks, which can be imported from pretty much any source you can think of: files, tapes, cameras of all standards, and even VR. The automatic sync is a gem when you have multi-angle shots, and it's hard to fault the fine-tuning tools that really make your video stand out from the crowd.
In the production industry, when most people think about editing software, their minds don't go to Windows Movie Maker on a PC. I'm not an expert on how to achieve that, but I gather a revamped look (which seems more like a professional editing suite) that retains the intuitive, user-friendly feel would be a start. The issue may not be with Movie Maker, but more so a computer's ability to handle the rich files (raw video) and storage required to edit.
Though Mac users don't have the sheer number of software choices available for PCs, Apple fans interested in editing video are well served, by four products in particular. At the entry level, the surprisingly capable and enjoyable-to-use iMovie comes free with every Mac sold since at least 2011. iMovie only offers two video tracks, but does good job with chroma-keying, and its Trailers feature makes it easy to produce slick, Hollywood-style productions.