Automatic search with ajax + php + jquery

I will comment first on the idea of the project and then on what little I have achieved so far. I have an excel where I have movie names, the idea is to automatically browse the file and go looking for the covers of these films and store the name and address of the image in a table. I know how to read the excel file and go through all the rows, retrieve the name in a variable and store it in a table, all through php. I know how to go through my temporary table, make an insert or an update. I use the api of " link " to search the data in this case I only want the cover, using jquery I made the order by ajax and retrieve the data that I want. But even having all these tools do not know how to go through each "name" perform the search with ajax, in case of recovering the cover then I will perform an update of my table where I will now have the location. So that it does not depend on a click, my php file has the following

<?php
    //Voy a recibir el nombre a buscar
    $pelicula = isset( $_POST[ 'pelicula' ] ) ? $_POST[ 'pelicula' ] : "xmen";
    echo "<div id='busco'>$pelicula</div>";
?>
<!-- Aqui muestro la caratula solo para saber que funciona -->
<div id="response-container"></div>

and initially I have

$( document ).ready( function () {      
    var query= $("#busco").text();  
    $.ajax({
        data: {"api_key" : "miapi", "query" : query},
        type: "GET",
        dataType: "json",
        url: "https://api.themoviedb.org/3/search/movie?",
        }).done(respuesta);

    function respuesta(data){
        if (data.total_results > 0){
            var output = "<img src=https://image.tmdb.org/t/p/w500"+data.results[0]['poster_path']+" width='300' height='300' data-toggle='tooltip' data-placement='top' data-html='true'>"         
            $("#response-container").html(output);              
        }
    }
});
</script>

I know it's a fool to have all this but it does not give me the head to fit the pieces