how do i upload videos to forums?

How do I upload videos to forums? I've seen it done before

Donna knows.

this is to forums like this--not to profile i know how to do that

On youtube videos, there is a box with the word "embed",  right under the screen. Just click it. And to the left will appear script. Copy that, and paste it to the comment box here.

<iframe width="480" height="360" src="https://www.youtube-nocookie.com/embed/0ptzs0298kM" frameborder="0" allowfullscreen></iframe>

" _mce_src="http://www.chess.com/<iframe width="480" height="360" src="http:/www.youtube.com/embed/0ptzs0298kM" frameborder="0" allowfullscreen></iframe>" style="margin:8px;" _mce_style="margin: 8px;" />

<iframe width="480" height="360" src="https://www.youtube-nocookie.com/embed/0ptzs0298kM" frameborder="0" allowfullscreen></iframe>