Like this?
posting vids

Well, obviously you're not a golfer.
The way i do it (there are other ways, i'm betting) is to click the 'share' button under the YouTube video, then the 'embed' button, then copy the gibberish that appears (it should already be highlighted)...
...then, back on this site, click the 'insert video' button above the comment window (the fourth icon from the left), and paste the copied gibberish into the 'source' field.
That should do it.
since i am having a difficult time with v3, can you bums out there show me how it's done?