user17818: I need a free and simple to use tool that is able to cut vidoes, fade to another videos (or instant change without any fade) and overlap audio (music or out of screen voices). Basically the basic features that everyone expect from a video editor and that almost all programs do not have.
Finding such a program for Windows 10 is a real challenge. In the meanwhile I become a expert in HandBrake transcoder, but still searching for a video editor.

user10839: As you are going to be uploading to YouTube anyway you can use the YouTube Video Editor that they include for free in Creator Studio.  It includes the ability to cut and spice videos as well as add music or other audio channels.  YouTube also includes a selection of free (as in beer and speech to the degree that you can use it on YouTube) music that you can easily add to the background.  
There are several video tutorials available on YouTube if you search for YouTube Video Editor Tutorial, such as this tutorial for 2017. 
Outside of that the free ones I know of are mostly Linux based so will be of no use for a Windows 10 user.  

For older versions of Windows and those of us living in the past there was Windows Movie Maker included as part of Windows Essentials (see a past answer for details).  If you are using Windows 10 or living in a time post January 2017 then Movie Maker is no longer available.  

17818: <p>I need a free and <strong>simple to use tool</strong> that is able to cut vidoes, fade to another videos (or instant change without any fade) and overlap audio (music or out of screen voices). Basically the basic features that everyone expect from a video editor and that almost all programs do not have.</p>

<p>Finding such a program for Windows 10 is a real challenge. In the meanwhile I become a expert in HandBrake transcoder, but still searching for a video editor.</p>
 10839: <p>As you are going to be uploading to <a href="https://youtube.com/" rel="nofollow noreferrer">YouTube</a> anyway you can use the <a href="https://youtube.com/editor" rel="nofollow noreferrer">YouTube Video Editor</a> that they include for free in Creator Studio.  It includes the ability to cut and spice videos as well as add music or other audio channels.  YouTube also includes a selection of free (as in beer and speech to the degree that you can use it on YouTube) music that you can easily add to the background.  </p>

<p>There are several video tutorials available on YouTube if you search for <a href="https://www.youtube.com/results?search_query=youtube%20editor%20tutorial" rel="nofollow noreferrer">YouTube Video Editor Tutorial</a>, such as this <a href="https://youtu.be/6QnaRRuezqw" rel="nofollow noreferrer">tutorial for 2017</a>. </p>

<p>Outside of that the free ones I know of are mostly Linux based so will be of no use for a Windows 10 user.  </p>

<hr>

<p>For older versions of Windows and those of us living in the past there was Windows Movie Maker included as part of Windows Essentials (<a href="https://video.stackexchange.com/a/15542/10839">see a past answer for details</a>).  If you are using Windows 10 or living in a time post January 2017 then Movie Maker is no longer available.  </p>
