Video shortcode "autoplay" should be at least an opt-in option

[mcanouil]

Some parts might be in Video.js but it is also hardcoded in the Lua shortcode code:

• quarto-cli/src/resources/extensions/quarto/video/video.lua

  Line 91 in 260edd0

  local SNIPPET = [[<iframe data-external="1" src="{src}{start}"{width}{height} title="{title}" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>]]

• quarto-cli/src/resources/extensions/quarto/video/video.lua

  Line 145 in 260edd0

  local SNIPPET = [[<iframe data-external="1" src="{src}"{width}{height} frameborder="0" allow="autoplay; title="{title}" fullscreen; picture-in-picture" allowfullscreen></iframe>]]

From what I gathered, it's mostly for YouTube/Vimeo videos.

Discussed in #7889

^{Originally posted by Nenuial December 12, 2023}

Description

I'm including videos in my revealjs presentation like so :

![](path/to/video)

And I have the problem that the video autoplay in the presentation despite having set the YAML option auto-play-media: false under the revealjs key.

When I use the speaker notes I have the additional problem that the video plays in both speaker window and main window.

Any hints as to what I could try to avoid the videos starting automatically?

[mcanouil]

Related in some aspects to:

• Adding attributes to video shortcodes like looping #3210

[mcanouil]

Hum, it's apparently now (1.4) handle by Video.js.
So I now wonder what's the exact case where the ifrane is built not by Video.js for Youtube/Vimeo videos.

---
title: "Quarto Playground"
format: html
---

{{< video https://vimeo.com/32001208 >}}

{{< video https://www.youtube.com/embed/wo9vZccmqwc >}}

This does not produce videos with autoplay.

[mcanouil]

I would suggest to take a deep look at the filter and possibly improve it to allow attributes in 1.5.