video shortcode, when in revealjs column, does not respect % dimensions

Bug description

According to the documentation, video shortcodes in revealjs should produce videos that respect the height and width specified as %. While shortcodes work as expected when videos occupy the full body of a slide, they do not when videos are placed in columns--unless video dimensions are specified in pixels.

While far from an HTML/CSS expert, I suspect that the issue might lie with the HTML/CSS being written by Quarto--potentially with the column class applied to revealjs columns.

This behavior does not arise when local video files are provided via Markdown syntax (e.g., ![](path/to/my_video.mp4). They simply grow/shrink the space available in revealjs columns.

Steps to reproduce

---
format: revealjs
---

# `video` in slide body

## Shortcode, without dimensions

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 >}}

## Shortcode, with dimensions = 100%

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 width="100%" height="100%" >}}

## Shortcode, with < 100% dimensions

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 width="100%" height="85%" >}}

## iframe, with < 100% dimensions

<iframe width="100%" height="85%" src="https://www.youtube.com/embed/yvi5uXQMvu4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>



# `video` in column

## Without dimensions

:::: {.columns}

::: {.column width="70%"}

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 >}}

:::

::: {.column width="30%"}

Some arbitrary content

:::

::::

## With dimensions = 100%

:::: {.columns}

::: {.column width="70%"}

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 width="100%" height="100%" >}}

:::

::: {.column width="30%"}

Some arbitrary content

:::

::::

## With dimensions < 100%

:::: {.columns}

::: {.column width="70%"}

{{< video https://www.youtube.com/embed/yvi5uXQMvu4 width="100%" height="85%" >}}

:::

::: {.column width="30%"}

Some arbitrary content

:::

::::

## iframe, dimensions = 100%

:::: {.columns}

::: {.column width="70%"}

<iframe width="100%" height="100%" src="https://www.youtube.com/embed/yvi5uXQMvu4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

:::

::: {.column width="30%"}
Some arbitrary content
:::

::::

## iframe, dimensions < 100%

:::: {.columns}

::: {.column width="70%"}

<iframe width="100%" height="85%" src="https://www.youtube.com/embed/yvi5uXQMvu4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

:::

::: {.column width="30%"}
Arbitrary content
:::

::::

## iframe, dimensions in px

:::: {.columns}

::: {.column width="70%"}

<iframe width="760" height="515" src="https://www.youtube.com/embed/yvi5uXQMvu4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

:::

::: {.column width="30%"}
Some arbitrary content
:::

::::

## Shortcode, dimensions in px

:::: {.columns}

::: {.column width="70%"}
{{< video https://www.youtube.com/embed/yvi5uXQMvu4 width="760" height="515" >}}
:::

::: {.column width="30%"}
Right column
:::

::::

Expected behavior

Video shortcode should produce a video that respects width and height dimensions specified in %.

Actual behavior

Video shortcodes respect width but not height when those dimensions are specified in %.

Your environment

• IDE: VScode
• OS: Windows 10

I've also replicated this in other environments (e.g., RStudio as IDE, Pop_OS! as OS, etc.)

Quarto check output

[>] Checking Quarto installation......OK
      Version: 1.2.269
      Path: C:\Program Files\RStudio\resources\app\bin\quarto\bin
      CodePage: 1252

[>] Checking basic markdown render....OK

[>] Checking Python 3 installation....OK
      Version: 3.9.7 (Conda)
      Path: C:/wbg/Anaconda3/python.exe
      Jupyter: 4.8.1
      Kernels: python3

[>] Checking Jupyter engine render....OK

[>] Checking R installation...........OK
      Version: 4.2.2
      Path: C:/PROGRA~1/R/R-42~1.2
      LibPaths:
        - C:/Program Files/R/R-4.2.2/library
      rmarkdown: 2.22

[>] Checking Knitr engine render......OK