Thank you for fixing it. What's the trick that I don't know?
When you want to embed a youtube video, position your cursor where you want it to go, and on the bottom row of "function buttons" the fifth one from the left is for youtube embeds.......if you hold your cursor over it, it will show you in text. Click on the button, and copy the youtube link in the space provided, just like you would use the "quote" function.
I always "preview" it to make certain it works before posting.
doc