Missing <video> Tag in Output HTML When Generated with Pandoc

[Kuhlig]

Hello,

I have encountered an issue while using Pandoc to convert an input HTML file into Reveal.js slides. The input HTML contains both a <video> tag and an <img> tag, but when I use Pandoc to generate the Reveal.js presentation, the <video> tag seems to be missing from the output.

Here is a simplified version of my input HTML:

<p>
    <video style="max-width: 320px; position: relative; left: 0px; top: 0px;" data-autoplay src="https://ico-cert.sirv.com/SampleSet/DEV/public/video/SampleSet.slide.video.ico-isms-27001-2022-foundation.start-EN.mp4" type="video/webm"></video>
    <img  style="position: relative; left: 350px; top: 30px;" src="https://ico-cert.sirv.com/SampleSet/DEV/public/_templates/ico-slide.png?text=ICO%0AISMS+27001%3A2022%0AFoundation&text.color=black&text.position.gravity=east&text.position.x=-10&text.position.y=110&text.align=right&text.size=50&text.font.family=Poppins&text.font.style=normal&text.font.weight=800">
</p>

To create the slides, I use the following Pandoc command:

/usr/bin/pandoc -t revealjs -s test.input.html -o test.out.html --metadata title="test"

However, in the generated output HTML, the <video> tag is missing, and only the <img> tag remains:

<section id="title-slide">
  <h1 class="title">test</h1>
</section>

<section class="slide level6">

<p><img
data-src="https://ico-cert.sirv.com/SampleSet/DEV/public/_templates/ico-slide.png?text=ICO%0AISMS+27001%3A2022%0AFoundation&amp;text.color=black&amp;text.position.gravity=east&amp;text.position.x=-10&amp;text.position.y=110&amp;text.align=right&amp;text.size=50&amp;text.font.family=Poppins&amp;text.font.style=normal&amp;text.font.weight=800"
style="position: relative; left: 350px; top: 30px;" /></p>
</section>

I would like to understand why the <video> tag is not included in the output and what steps I can take to ensure that it is properly processed and included in the Reveal.js presentation.

Thank you for your assistance.

Best regards, Rob