I’m often asked where users can find the download path for files so I’ve created a list here:

App Admin (App Downgrade tool)
Users can obtain the version number they wish to downgrade via the app’s iTunesMetadata.plist in /private/var/mobile/Containers/Bundle/Application/.

CartoonHD
var/mobile/documents

Moviebox
var/mobile/library/artworks

Musicbox
var/mobile/library/caches

Music FM
/private/var/mobile/Containers/Data/Application/578C7055-A071-4CD7-AD92-626D6BFD27D0/Documents
or
/private/var/mobile/Containers/Data/Application/Music FM/Documents

Universal Video Downloader
/var/mobile/Media/Universal_Video_Downloader

YouTube ++
var/mobile/Containers/Data/Application/”your YouTube App Code”/Library/caches/ytppdownloads

We will update this list over time we hope you find it use it useful.