Generate automatic oEmbed from URL with Advanced Custom Field

content-single.php

<?php
  // Make sure the plugin is active
  if ( function_exists( 'get_field' ) ) {
    $lecture_video = get_field('lecture_video');
  }
  // If the current post is a Lecture post and we have a lecture video URL, use oEmbed
  if ( 'lecture' === get_post_type() ) {
    if ( $lecture_video ) {
        echo wp_oembed_get( $lecture_video );
    }
  }