video_embed_field_plyr-8.x-1.2/templates/video-oembed-plyr.html.twig

{#
  To change or add data to the default settings use the twig merge filter
  {% set plyr_settings = plyr_settings|merge({'loadSprite':false,'blankVideo': '/'~active_theme_path()~'/assets/video/blank.mp4'}) %}
#}
 <div {{ attributes}} data-plyr-config="{{ plyr_settings|json_encode }}">
    {{ iframe }}
 </div>