This is an overview of Windows, macOS, and Linux operating systems from a usage perspective. While the other videos have been using Linux for various tutorials, this video attempts to just offer more background about how Linux is crafted and why it has so many distributions. The ugly term is Fragmentation, which is true, but one could also look at that as choice and options.
Since this is only focusing primarily on the desktop, desktop user interfaces (UI) are also explained a bit, as well as highlighting useful features/commands for installing applications on Linux.
This is not an in-depth comparison as there are many many differences in terms of how the architectures, permissions, and code bases differ between each OS. I hope this at least offers some background as to how the flexibility of Linux can lead to some complexity, and how that complexity can be managed.
Some more sources for images and market share are largely taken from Wikipedia:
(Note: there is a bit of variance in the numbers I show and the raw desktop numbers from NetMarketShare data, but there is a constant variance. Windows is still king of desktops, Linux rules in the server space and, through Android, the mobile markets as well.)