I think most (probably none) can not upload a <iframe> , ie Youtube player will not work directly, what you can do is put a image with a link to the Youtube address, you can get the address of the image and video like this:
-
https://img.youtube.com/vi/<ID DO VIDEO>/0.jpg (returns the main video image / thumb)
-
https://www.youtube.com/watch?v=<ID DO VIDEO>
Usage example
[](https://www.youtube.com/watch?v=<ID DO VIDEO>)
Stack Overflow markdown test example
Code used:
[](https://www.youtube.com/watch?v=R1V8OUOb-Hw)
Test:
Example with markdown-it
This example is just for testing, I used the markdown-it library. (which is able to run inside the site's snippet stack):
//Inicia o markdown
var mdit = window.markdownit();
var editor = document.getElementById("editor");
var preview = document.getElementById("preview");
document.getElementById("testar").onclick = function () {
var resultado = mdit.render(editor.value);
preview.innerHTML = resultado;
};
#editor, #preview {
width: 100%;
}
#editor {
min-height: 200px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/markdown-it/8.4.0/markdown-it.js"></script><textareaid="editor">
Lista numérica:
1. foo
1. bar
1. baz
## sub-titulo
'codigo' inline
Código por indetanção
// Some comments
line 1 of code
line 2 of code
line 3 of code
Bloco de código
'''
código
'''
[](https://www.youtube.com/watch?v=R1V8OUOb-Hw)</textarea>
<button id="testar">Testar</button>
<hr>
<div id="preview"></div>
