Trouble with background video in revealjs

[rodrigo-j-goncalves]

Description

I want to embed a YouTube video in the background of my revealjs presentation.
According to the docs, this is valid:

## {background-video="https://youtu.be/wo9vZccmqwc?autoplay=1"}

So I replaced the video code (wo9vZccmqwc) of the example with my own video (0xpr7In5c9M) and tried that. But didn't work. I tried with the full URL from YouTube, but I can't make it work.

What am I doing wrong?

This is a simple example (please use any video from your PC in the last slide; it didn't feel justifiable to create a repository only to share a random video).

---
title: "Minimum reproducible example"
format: revealjs
---

## As instructed in documentation {background-video="https://youtu.be/0xpr7In5c9M?autoplay=1"}

[This doesn't work (remote video, link as in [documentation](https://quarto.org/docs/authoring/videos.html#backgrounds))]{.mark}

## Copy-pasting the URL {background-video="https://www.youtube.com/watch?v=0xpr7In5c9M"}

[This also doesn't work (remote video, copy-pasting the URL)]{.mark}

## A video file in my PC {background-video="media/videos/m2-res_480p.mp4"}

[This works (local video)]{.mark}

Quarto version: 1.7.32
OS: Linux Ubuntu 22.04

[mcanouil]

This is a documentation issue as Youtube provider is actually not supported, see:

• Support video provider (like Youtube) as background-video for revealjs  #11265

This features comes from Reveal.js directly: https://revealjs.com/backgrounds/#video-backgrounds