Custom Sell Media Loop and Overlay text

//My custom Sell Media Loop
function my_sell_media_content_loop( $post_id, $i ){
    $class = apply_filters( 'sell_media_grid_item_class', 'sell-media-grid-item', $post_id );
    if ( ! sell_media_has_multiple_attachments( $post_id ) )
        $class .= ' sell-media-grid-single-item';
    $html  = '<div id="sell-media-' . $post_id . '" class="' . $class . '">';
    $parent = false;
    if( !is_archive() ){
        // if there is a post parent, change link to gallery
        $parent = sell_media_attachment_parent_post( $post_id );
    }

    if ( $parent ) {
        $link = add_query_arg( array(
            'id' => $post_id
        ), get_permalink( $parent->ID ) );
        $post_id = $parent->ID;
    } else {
        $link = get_permalink( $post_id );
    }
    $html .= '<a href="' . esc_url( $link ) . '" ' . sell_media_link_attributes( $post_id ) . ' class="sell-media-item">';
    $html .= sell_media_item_icon( $post_id, apply_filters( 'sell_media_thumbnail', 'medium' ), false );
    if ( ! sell_media_has_multiple_attachments( $post_id ) ) {
        $attachment_id = sell_media_get_attachment_id( $post_id );
        $html .= '<div class="sell-media-quick-view-disabled" data-product-id="' . esc_attr( $post_id ) . '" data-attachment-id="' . esc_attr( $attachment_id ) . '">' . apply_filters( 'sell_media_quick_view_text', __( 'Quick View', 'sell_media' ), $post_id, $attachment_id ) . '</div>';
    }
    else {
        $html .= '<div class="sell-media-view-gallery">' . apply_filters( 'sell_media_view_gallery_text', __( 'View Gallery', 'sell_media' ) ) . '</div>';
    }
    $html .= '</a>';
    $html .= '</div>';
    return $html;
}
add_filter( 'sell_media_content_loop', 'my_sell_media_content_loop', 9, 2 );

//Replace Quick View text
function sell_media_custom_view_text(){
    global $post;
    $free_download_meta = get_post_meta( $post->ID, 'sell_media_free_downloads', true );
    if ( ! empty ( $free_download_meta ) ) {
        $title = "Download";
    } else {
        $title = "Buy";
    }
  return $title;
}
add_filter( 'sell_media_quick_view_text', 'sell_media_custom_view_text' );