WordPress at a glance
filter is not described

the_excerpt_embed filter-hook . WP 4.4.0

Filters the post excerpt for the embed template.

Usage

add_filter( 'the_excerpt_embed', 'filter_function_name_2497' );
function filter_function_name_2497( $output ){
	// filter...

	return $output;
}
$output(string)
The current post excerpt.

Where the hook is called

the_excerpt_embed()
the_excerpt_embed
wp-includes/embed.php 890
echo apply_filters( 'the_excerpt_embed', $output );

Where the hook is used (in WP core)

wp-includes/default-filters.php 554
add_filter( 'the_excerpt_embed', 'wptexturize' );
wp-includes/default-filters.php 555
add_filter( 'the_excerpt_embed', 'convert_chars' );
wp-includes/default-filters.php 556
add_filter( 'the_excerpt_embed', 'wpautop' );
wp-includes/default-filters.php 557
add_filter( 'the_excerpt_embed', 'shortcode_unautop' );
wp-includes/default-filters.php 558
add_filter( 'the_excerpt_embed', 'wp_embed_excerpt_attachment' );