I am fairly new to markup (though it\'s extremely easy to pickup). I am working on a package and am trying to get the wiki pages looking nice as a help manual. I can insert
Expanding on @MGA's Answer
While it's not possible to embed a video in Markdown you can "fake it" by including a valid linked image in your markup file, using this format:
[](http://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE "Video Title")
If this markup snippet looks complicated, break it down into two parts:
an image

wrapped in a link
[link text](https://example.com/my-link "link title")
We are sourcing the thumbnail image directly from YouTube and linking to the actual video, so when the person clicks the image/thumbnail they will be taken to the video.
[](https://www.youtube.com/watch?v=StTqXEQ2l-Y "Everything Is AWESOME")
OR If you want to give readers a visual cue that the image/thumbnail is actually a playable video, take your own screenshot of the video in YouTube and use that as the thumbnail instead.
[](https://youtu.be/StTqXEQ2l-Y?t=35s "Everything Is AWESOME")
While this requires a couple of extra steps (a) taking the screenshot of the video and (b) uploading it so you can use the image as your thumbnail it does have 3 clear advantages:
Taking and uploading a screenshot takes a few seconds but has a big payoff.
Since this is standard markdown, it works everywhere. try it on GitHub, Reddit, Ghost, and here on Stack Overflow.
This approach also works with Vimeo videos
[](https://vimeo.com/3514904 "Little red riding hood - Click to Watch!")