Using wp_oembed_get within Iframe getting Forbidden error

Hello!
I’m new on PHP and I’m trying to embed a youtube video on WordPress. I created an Advanced Custom Field where the user can simply put the name of the video and paste the url. With the code below it seems to work well but…

<?php $loop = new WP_Query( array( ‘post_type’ => ‘course_video’,
‘orderby’ => ‘post_id’, ‘order’ => ‘ASC’ ) ); ?>

<?php while( $loop->have_posts() ) : $loop->the_post(); ?>

<h2><?php the_title(); ?></h2>

<?php echo wp_oembed_get( get_field( ‘video_url’ ) ) ?>

<?php endwhile; wp_reset_query(); ?>

I’d like to see the video wider and then I tried this similar code:

<?php $loop = new WP_Query( array( ‘post_type’ => ‘course_video’,
‘orderby’ => ‘post_id’, ‘order’ => ‘ASC’ ) ); ?>

<?php while( $loop->have_posts() ) : $loop->the_post(); ?>

<h2><?php the_title(); ?></h2>

<iframe width=”100%” height=”415″
src=”<?php echo wp_oembed_get( get_field( ‘video_url’ ) ) ?>”
frameborder=”0″ allowfullscreen></iframe>

<?php endwhile; wp_reset_query(); ?>

And I get this error:

Forbidden

You don’t have permission to access /b2w/

Apache/2.4.9 (Win64) PHP/5.5.12 Server at localhost Port 80

There’s any way to resize the video using my first code? And what I’m doing wrong in the second code?

I’m stuck with this, I searched a lot and I didn’t find the reason neither a different approach to get this working well.

Thanks in advance