On the right side of the video (on youtube) there is a line that says "embed".Is it possible to post the link so the video can be seen here on the post? I tried but didn't work.
You need to highlight and copy that line, then paste onto the forum reply here.
Highlight the text that you pasted on the reply, and press the youtube button (you will see it above your reply). This is on "advanced reply".
Once you have done this, you will get your vid shown, like this for example: