{{ $videoid := .Get "videoid" }}
{{ if not $videoid }}
  {{ $videoid := .Get 0 }}
  {{ if not $videoid }}
    {{ errorf "'videoid' parameter required!" }}
  {{ end }}
{{ end }}

{{ $params := .Get "params" }} <!-- not required. List of params here: https://developers.google.com/youtube/player_parameters -->
<lite-youtube videoid="{{ $videoid }}"{{ if $params }} params="{{$params}}"{{ end }}></lite-youtube>