ensure video shortcode works with embed-resources and self-contained

Author: cscheid

news/changelog-1.3.md

@@ -1 +1,3 @@
+## Miscellaneous
 
+- ensure `video` shortcode works with `embed-resources` and `self-contained` ([#3310](https://github.com/quarto-dev/quarto-cli/issues/3310))

src/resources/extensions/quarto/video/video.lua

@@ -77,7 +77,7 @@ local youTubeBuilder = function(params)
   local YOUTUBE_EMBED = 'https://www.youtube.com/embed/'
   params.src = YOUTUBE_EMBED .. match
 
-  local SNIPPET = [[<iframe src="{src}{start}"{width}{height} title="{title}" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>]]
+  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>]]
   snippet = replaceCommonAttributes(SNIPPET, params)
 
   local result = {}

tests/docs/smoke-all/2022/11/14/3310.qmd

@@ -0,0 +1,13 @@
+---
+title: "Quarto"
+format:
+  html:
+    toc: true
+    #self-contained: true
+_quarto:
+  tests:
+    html:
+      ensureHtmlElements:
+        - ["iframe[data-external=\"1\"]"]
+---
+{{< video https://www.youtube.com/embed/wo9vZccmqwc >}}