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EN

<CollectionView ItemsSource="{Binding ItemList}"
                        x:Name="MediaStreamCollectionView"
                        SelectionMode="Single"
                        SelectionChanged="SelectionChanged">

<contentView:FavoriteButton MediaStreamItem="{Binding this}">

ObservableCollection<MediaStreamItem> ItemList { get; set; }

        public static readonly BindableProperty MediaProperty = BindableProperty.Create(nameof(MediaProperty), typeof(MediaStreamItem), typeof(FavoriteButton), new MediaStreamItem());

    public MediaStreamItem MediaStreamItem
    {
        get => (MediaStreamItem) GetValue(FavoriteButton.MediaProperty);
        set => SetValue(FavoriteButton.MediaProperty, value);
    }