{{ $videos := (union .Page.Pages .Page.Sections) }}
{{ $series := split (.Get "series") ", " }}

<div class="videos-wrapper">
{{ range where $videos "Params.series" "intersect" $series }}
  <div class="video-card">
    <a href="{{ .RelPermalink }}"><img src="https://img.youtube.com/vi/{{ .Params.youtubeID }}/mqdefault.jpg" alt="{{ .Title }}"></a>
    <p class="video-title">{{ .Title }}</p>
    {{ if .Params.date }}<p class="video-date">{{ time.Format "Jan 2, 2006" .Params.date }}</p>{{ end }}
  </div>
{{ end }}
</div>