[Tom00000]

I tested. The result is was not imagined earlier and is the fourth way. If I change the database and make the scan , MC does nothing because it has all nfo files created during scanning with previous database.

We have 2 problems .

1. The situation: <plot>This Music Video could not be identified.</plot>
No info from first database blocks possibility to check if the second database has any info about the material. It is the logical bug in MC.
The scan should be always possible for this files (maybe optional) in every database for check is data is updated.

2. IMVDB's database returned false data .
No chance to fix wrong stored data in the .nfo files .

Edit.
I tested. The result was not imagined earlier and is the fourth way. If I change the database and make the scan , MC does nothing because it has all nfo files created during scanning with previous database.

We have 2 problems .

1. The situation: <plot>This Music Video could not be identified.</plot>
No info from first database blocks possibility to check if the second database has any info about the material. It is the logical bug in MC.
The scan should be always possible for this files (maybe optional) in every database for check if data is updated.

2. IMVDB's database returned false data .
No chance to fix wrong stored data in the .nfo files .

I compared nfo from IMVDB and from the audiodb. I see the same errors . It looks like MC does not use data from the audiodb , where it is correct - I am able to compare the same data from Kodi's scraper.
Example.

Toni Braxton - Unbreak My Heart.mp4 the audiodb is not able to find because of lack of "-" char in the name. The IMVDB does not have problem with it. I have nfo :
<title>Un-Break My Heart</title>
<year>1996</year>
<artist>Toni Braxton</artist>
after scan theaudiodb and this is not possible. MC's error ?

Samples of errors :
Paradox Sequenz - Global.nfo
<title>Global Warming</title>
<year>2016</year>
<artist>John Grant</artist>

Pappa Razzi - Dance With Me.nfo
<title>Dance With Me</title>
<year>2008</year>
<artist>Lexington Bridge</artist>

Parkay - Grindin.nfo
<title>Grindin</title>
<year>2016</year>
<artist>DJ6Pac</artist>

The errors of MC for sure. Each nfo file created by MC for each database has :
<genre>
</genre>

As I have seen in Kodi , the both databases have this information , because Kodi uses it after own scraping. MC ignores this information and does not write to nfo files.

The others :
<track>
</track>
<studio>
</studio>
I am not sure if exist in databases or not.


As last I tested wikipedia as database and results :

Pappa Razzi - Dance With Me.nfo
<title>Paparazzi</title>
<year>2009</year>
<artist>Lady Gaga</artist>

It looks , I have to make 3 full scans for each database and try to merge the results. First I will wait for MC which will save <genre> information to .nfo file, because it is the data I need the most.