public static void SetSeekPosition(Film film, TimeSpan position, ObservableCollection<Film> filmListCollection)
{
filmListCollection[filmListCollection.IndexOf(film)].SeekPosition = position;
}
public static void SetLastPlayed(Film film, ObservableCollection<Film> filmListCollection)
{
filmListCollection[filmListCollection.IndexOf(film)].LastPlayed = DateTime.Now;
}