Where to change settings for Allowed file types?

I have
Media 7.x-2.0-unstable7+53-dev
Media Gallery 7.x-2.x-dev

When I try to open Media file selector I see that I can upload only
Allowed file types: jpg jpeg gif png txt doc docx xls xlsx pdf ppt pptx pps ppsx odt ods odp.

I decided to add mp3 and mp4.

Changed settings in media_gallery_file field to jpg, jpeg, gif, png, txt, doc, docx, xls, xlsx, pdf, mp3, mov, mp4, mpeg, avi, wmv

But the settings I see opening selector are same.

I opened media.variables.inc and changed

'file_extensions' => variable_get('file_entity_default_allowed_extensions', 'jpg jpeg gif png txt doc docx xls xlsx pdf ppt pptx pps ppsx odt ods odp') . ' mp3 mov mp4 m4a m4v mpeg avi ogg oga ogv wmv ico',

to

'file_extensions' => variable_get('file_entity_default_allowed_extensions', 'jpg jpeg gif png txt mp3 mp4 doc docx xls xlsx pdf ppt pptx pps ppsx odt ods odp') . ' mov m4a m4v mpeg avi ogg oga ogv wmv ico',

But it did not help. The message I see in Media Selector is same:

Allowed file types: jpg jpeg gif png txt doc docx xls xlsx pdf ppt pptx pps ppsx odt ods odp.