Advanced Custom Fields plugin : displaying a YouTube video

You can try using wp_oembed_get and a textfield. You add the youtube url in the textfield.

Assuming the field name is youtube_url, your code will be something like:

if( get_field('youtube_url') ){
  $embed_code = wp_oembed_get( get_field('youtube_url') );
  echo $embed_code;
}

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