WordPress at a glance
filter is not described

wp_video_embed_handler filter-hook . WP 3.6.0

Filters the video embed handler callback.

Usage

add_filter( 'wp_video_embed_handler', 'filter_function_name_8012' );
function filter_function_name_8012( $handler ){
	// filter...

	return $handler;
}
$handler(callable)
Video embed handler callback function.

Where the hook is called

wp_maybe_load_embeds()
wp_video_embed_handler
wp-includes/embed.php 208
wp_embed_register_handler( 'video', '#^https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 );

Where the hook is used (in WP core)

Does not used.