Background, picture or video in touch bar

The ability to put a picture or video in the touchbar (full size)

You can just use a normal touchbar button and put a big icon image on it:

Might need to add a little negative padding inside and change the background color to black.
Video are not possible though (at the moment).

However the Touch Bar display area is only 30px high, so it will never be able to look like in your mockup.