Video autopley

I have to ask again because I don't understand it.
In Template Creator CK when I add a video to:
wrapper> Edit> Background video. there is a Youtube video url field there, and there I put a link copied from youtobe from the browser bar, and the video works automatically on the front of the page, starts itself.

How to do the same in PBCK I Slid show CK
How to put a background video from youtube that will start by itself

I thought that when I add the code you showed like this: It is in Slideshow CK, or PBCK, that the video will play on the page automatically, but it doesn't work that way
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Update post:
I loaded a movie from a folder and it works great with no autostart problems.
It's a pity that autostart does not work for videos shown after the youtube link.