How to download different format through the admin(boot) panel?

You need to allow the standard loader file located in the admin area(catalog download) to download other formats: mp3, mp4 and others? Precaudal controller download.twig, download.php and download_form.twig. But, never found anything resembling that could change the download format.
Where can I find these formats, where to resolve them?
April 7th 20 at 11:08
2 answers
April 7th 20 at 11:10
1) Find piece of code where there is a filter on file types. To add there avi, mp4 and so on
2) Find the piece of code responsible for the output, put a condition there If the file and the video stuff for playback.
Right, I understand that, regarding the first paragraph.
The fact that I can not find, not in controllers, not in the template. Well, either I don't understand is how to look like I need a piece of code. - jolie.Be commented on April 7th 20 at 11:13
@jolie.Be, it sucks. Maybe then you freelancer for this find? Can schA himself to look at the hosting by the way. - raleigh.Ledner commented on April 7th 20 at 11:16
April 7th 20 at 11:12
Admin/System/Settings/=name of store= , tab "Server"
There allowed file types and mime types

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