Just start লেখা ফোরাম post and paste a link in text. There are no separate options (like for example, pictures and চলচ্ছবি adding) for posting links. If it's a video link, click on video adding button and paste the link there 🎥.
P. S. For প্রশ্ন like this I would recommend posting them in সংগঠন like
link 🙂
