*Working As Intended.
Youtu.be is a redirect to the actual video.
So it's not technically a valid link, because there's no video "there"
Youtube gives you a "share" link which is a link to SHARE with people to get TO the video.
It's not a link OF the video.
The embeding feature on the forums needs the link directly to the video.
Youtubes own embed script also uses the full link.
Code:
<iframe width="560" height="315" src="https://www.youtube.com/embed/znqQY9wGgDE" frameborder="0" allowfullscreen></iframe>
but our forums don't support HTML embedding or whatever that is.
Fancier websites and things like Discord can translate the shortened link and auto embed.