Admin Forum:Will pre-roll ads show up for embedded YouTube videos?

I embedded a video in my wiki and it didn't show the pre-roll ads from YouTube's site. That's awesome!

I'm just wondering if that's always the case, or whether sometimes they will show up??
 * In my experience, I have yet to see an embedded youtube video with an advert. Perhaps they are blocked, or perhaps such adverts are only displayed when on youtube's site, I'm not sure. Someone may have a more knowledgeable response, but for now I'd assume they don't appear until you see otherwise.