The "TubePress Content Directory" is a special directory located alongside your TubePress installation. The purpose of this directory is to store any customizations (add-ons, themes, or low-level configuration) that you make to TubePress. Since it does not change between TubePress versions, it's "upgrade safe."
wp-content/tubepress-content. In most cases, TubePress auto-creates this directory when you activate TubePress for the first time.
The TubePress Content Directory may contain zero or more of the following immediate subdirectories:
themeswhich may contain themes that aren't shipped with TubePress
add-onswhich may contain add-ons that aren't shipped with TubePress
configwhich may contain low-level configuration for TubePress such as