I did a quick search of the forum and didn't see this reported, so I'm assuming it's something I'm missing or doing wrong!
If I paste the embed code into a post using Marsedit, in the preview window, I see the embed code, not the video?
To resolve this, I need to delete the embed code, switch to HTML and paste it back in. I can then see the video. I then have to switch back to Rich Text to continue editing (well I don't have to, but I prefer to write in the RT editor).
So am I doing something wrong?