Wanting to share on this site a video of a malfunction on my rig, I learned that they don’t embed like inline images.
Searching for instructions on how to do this, I found this tool.
It creates ‘iterated’ markdown that looks like this.
[!(http://img.youtube.com/vi/G_QPG6clT_o/0.jpg)](http://www.youtube.com/watch?v=G_QPG6clT_o "LC100 relay")
which genericized looks like
It’s like an inline link that starts with an inline (static) image. That image is the thumbnail you create (in YouTube) for your video. Once you creadt that, the above command ‘just works’.