[chvid]

You can embed an image by embedding html (via the html 'directive') I suppose.

Embedding images inside markdown is really where things break down from the natual very text orientated and direct workflow of writing markdown. All of a sudden you have to fiddle with urls or files, somehow put your image somewhere, and then making sure the markdown link you made works correctly.

This particular markdown variation looks like it is tailored for technical documentation and there the sequence diagrams make a lot of sense.