public MediaManager(IPathManager pathManager, IVideoJoiner videoJoiner)
{
_appStoragePath = pathManager.GetAppStoragePath();
_appImagesStoragePath = pathManager.GetImagesStoragePath();
_appVideosStoragePath = pathManager.GetVideosStoragePath();
_appCachePath = pathManager.GetAppCachePath();
InitialiseDirectories();
_videoJoiner = videoJoiner;
}