user33674: Over on Meta Stack Exchange, I am attempting to compile a complete list of Stack Exchange sites which support YouTube embedding.
Searching on Arduino Meta, I was unable to find any discussion of whether embedded YouTube videos are supported. Because YouTube embedding is not shown in the markdown preview window, there's no way to test without posting publically.
Are embedded YouTube videos supported on Arduino?

user33674: There's only one way to find out.
Testing YouTube URL Embedding
Regular https://www.youtube.com/watch?v=gocwRvLhDf8
https://www.youtube.com/watch?v=gocwRvLhDf8

Timestamped https://www.youtube.com/watch?v=gocwRvLhDf8&t=22
https://www.youtube.com/watch?v=gocwRvLhDf8&t=22

Shortened https://youtu.be/gocwRvLhDf8
https://youtu.be/gocwRvLhDf8

/Embed https://www.youtube.com/embed/gocwRvLhDf8
https://www.youtube.com/embed/gocwRvLhDf8

Embedded HTML <iframe width="854" height="480" src="https://www.youtube.com/embed/gocwRvLhDf8" frameborder="0" allowfullscreen></iframe>

Mobile https://m.youtube.com/watch?v=gocwRvLhDf8
https://m.youtube.com/watch?v=gocwRvLhDf8

Flash Player https://www.youtube.com/v/gocwRvLhDf8
https://www.youtube.com/v/gocwRvLhDf8

YouTube TV https://www.youtube.com/tv#/watch/video/idle?v=gocwRvLhDf8
https://www.youtube.com/tv#/watch/video/idle?v=gocwRvLhDf8

See Which sites have YouTube embedding on?

33674: <p><a href="https://meta.stackexchange.com/a/298854/351462">Over on Meta Stack Exchange</a>, I am attempting to compile a complete list of Stack Exchange sites which support YouTube embedding.</p>

<p>Searching on Arduino Meta, I was unable to find any discussion of whether embedded YouTube videos are supported. Because <a href="https://meta.stackexchange.com/questions/299082/display-embedded-youtube-videos-in-markdown-preview">YouTube embedding is not shown in the markdown preview window</a>, there's no way to test without posting publically.</p>

<p><strong>Are embedded YouTube videos supported on Arduino?</strong></p>
 33674: <p>There's only one way to find out.</p>

<h1>Testing YouTube URL Embedding</h1>

<p><strong>Regular</strong> <code>https://www.youtube.com/watch?v=gocwRvLhDf8</code></p>

<p><a href="https://www.youtube.com/watch?v=gocwRvLhDf8" rel="nofollow noreferrer">https://www.youtube.com/watch?v=gocwRvLhDf8</a></p>

<hr>

<p><strong>Timestamped</strong> <code>https://www.youtube.com/watch?v=gocwRvLhDf8&amp;t=22</code></p>

<p><a href="https://www.youtube.com/watch?v=gocwRvLhDf8&amp;t=22" rel="nofollow noreferrer">https://www.youtube.com/watch?v=gocwRvLhDf8&amp;t=22</a></p>

<hr>

<p><strong>Shortened</strong> <code>https://youtu.be/gocwRvLhDf8</code></p>

<p><a href="https://youtu.be/gocwRvLhDf8" rel="nofollow noreferrer">https://youtu.be/gocwRvLhDf8</a></p>

<hr>

<p><strong>/Embed</strong> <code>https://www.youtube.com/embed/gocwRvLhDf8</code></p>

<p><a href="https://www.youtube.com/embed/gocwRvLhDf8" rel="nofollow noreferrer">https://www.youtube.com/embed/gocwRvLhDf8</a></p>

<hr>

<p><strong>Embedded HTML</strong> <code>&lt;iframe width="854" height="480" src="https://www.youtube.com/embed/gocwRvLhDf8" frameborder="0" allowfullscreen&gt;&lt;/iframe&gt;</code></p>



<hr>

<p><strong>Mobile</strong> <code>https://m.youtube.com/watch?v=gocwRvLhDf8</code></p>

<p><a href="https://m.youtube.com/watch?v=gocwRvLhDf8" rel="nofollow noreferrer">https://m.youtube.com/watch?v=gocwRvLhDf8</a></p>

<hr>

<p><strong>Flash Player</strong> <code>https://www.youtube.com/v/gocwRvLhDf8</code></p>

<p><a href="https://www.youtube.com/v/gocwRvLhDf8" rel="nofollow noreferrer">https://www.youtube.com/v/gocwRvLhDf8</a></p>

<hr>

<p><strong>YouTube TV</strong> <code>https://www.youtube.com/tv#/watch/video/idle?v=gocwRvLhDf8</code></p>

<p><a href="https://www.youtube.com/tv#/watch/video/idle?v=gocwRvLhDf8" rel="nofollow noreferrer">https://www.youtube.com/tv#/watch/video/idle?v=gocwRvLhDf8</a></p>

<hr>

<p><sub>See <a href="https://meta.stackexchange.com/a/298854/351462"><em>Which sites have YouTube embedding on?</em></a></sub></p>
