This site does not play short, you must rewrite the URL.
https://youtube.com/shorts/WlY8Mir54GE?si=N8aiQFl6WEgur7y_
to
https://youtube.com/watch?v=WlY8Mir54GE?si=N8aiQFl6WEgur7y_
So shorts/… has to always be changed to watch?v= and then remove the last /