PeerTube/client/src/app/shared/shared-custom-markup/custom-markup-help.component.html

<ng-container i18n>
  <a href="https://en.wikipedia.org/wiki/Markdown#Example" target="_blank" rel="noreferrer noopener">Markdown compatible</a> that also supports <a href="https://docs.joinpeertube.org/api-custom-client-markup" target="_blank" rel="noreferrer noopener">custom PeerTube HTML tags</a>
</ng-container>