curriculum/layouts/shortcodes/yt.html

<div {{ with .Get "class" }}class="{{ . }}"{{ else }}style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"{{ end }}>
    <iframe src="https://www.youtube.com/embed/{{ .Get "id" }}?enablejsapi=1{{ with .Get "color" }}{{ if eq . "white" }}&color=white{{ end }}{{ end }}{{ with .Get "autoplay" }}{{ if eq . "true" }}&autoplay=1{{ end }}{{ end }}{{ if isset .Params "yt_start" }}&start={{ .Get "yt_start" }}{{ end }}{{ if isset .Params "yt_end" }}&end={{ .Get "yt_end" }}{{ end }}{{ with .Get "modestbranding" }}{{ if eq . "true" }}&modestbranding=1{{ end }}{{ end }}"{{ if .Get "class" }} class="{{ .Get "class" }}"{{ else }} style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" {{ end }} allowfullscreen></iframe>
</div>