C'est ça?
<iframe allowfullscreen="" data-controller="core.front.core.autosizeiframe" data-embedcontent="" data-embedid="embed6933201541" scrolling="no" src="<___base_url___>/topic/55211-au-nom-de-lempereur-systeme-de-campagne/?do=embed" style="height:195px;max-width:502px;"></iframe>