Windows 10 has a great easier to use tool called the GameBar which you can use to easily record video clips while gaming.
You can then easily trim the videos using windows 10's built in Video Editor.
But the problem is that the editor will not preserve the recording framerate, and smooshes it down to 30FPS. This is not ideal especially when you might have recorded it in glorious 60FPS!! Also.. Twitter doesn't accept anything higher than 60 fps!