The media files(videos and audio) that you use inside the app, are never collected, copied, manipulated, transcoded or stored anywhere else. The app holds in one internal file your preferences, meaning only the paths to the files that you want in the order you want when creating the Wallpaper Timeline. This info is never shared, copied, transmitted, etc outside the app. Also, we don't also collect any personal information.
The app. is used as a "Wallpaper Player" for your Windows 10 PC only. It doesn't do any manipulation on the media files that you select to use (e.g. transcoding, scaling, upsizing or downsizing resolution, etc).
The media files are transfered only to the RAM (the temporary memory of your PC) during playback. When you close the app the memory is cleared and we don't collect or save anything else.
No extra info about the file type, the codec, the encryption method, or anything else is collected, stored, shared. All your personal preferences, language selection preferences, etc. is never collected from the app, nor is distributed to any other third party outside the app. Everything that you do is stay inside the app.