Use the .Get
method to get the string value
{{ $link := .Get "link"}}
{{ $url := urls.Parse $link }}
{{ $q := $url.Query }}
++ {{ $videoId := $q.Get "v" }}
{{ printf "%#v" $link }}
{{ printf "%#v" $q.v }}
<div class="videos-wrapper mx-auto">
<div class="py-4">
++ <iframe class="mx-auto" width="560" height="315" src="https://www.youtube.com/embed/{{$videoId}}" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>
</div>