Does VLC media player store the files or its history in a hidden location

I think some of youtube videos are somehow get the video and audio file separated so when you download the video the file itself contain no audio. Try to go back to the site and download the audio file, and insert it to the video. it always have extension .m4a

Found the answer at the following link: http://www.ghacks.net/2013/05/12/how-to-disable-vlc-media-players-open-recent-media-feature/

1. Click on Tools > Preferences in the top menu or use the shortcut Ctrl-P to open the preferences.
2. While in the Interface section here, locate the Save recently played items option on the page.
3. Uncheck the box to disable the logging of played videos.
4. Click on the save button.

Note that you do need to restart VLC before the change takes effect. You will notice that the menu is no longer displayed under Media. You can re-enable it by following the same steps outlined above.

Disabling the feature does not clear the list. If you re-enable the list, you see the videos that have been accessed before it was disabled. So, use the clear option first before you disable it