{{ $videoid := .Get "videoid" }}
{{ $params := .Get "params" }} <!-- not required. List of params here: https://developers.google.com/youtube/player_parameters -->
{{ $img := .Get "img"}} <!-- not required. The initial background image instead of a generated one. -->
{{ if $img }}
  {{ $bkImg := absURL (printf "images/%s" $img) }}
{{ end }}
<lite-youtube videoid="{{$videoid}}"{{ if $img }} style="background-image: url('{{$bkImg}}')"{{ end }}{{ if $params }} params="{{$params}}"{{ end }}></lite-youtube>