I believe it is referring to the 'Chef Menteur Highway in New Orleans East https://www.google.pl/search?q=New+orleans+east+chef&oq=New+orleans+east+chef&aqs=chrome..69i57j0l3.16185j0j7&sourceid=chrome&ie=UTF-8

There is another video related to this one and I believe it gives a bit more context. The link is here: https://www.youtube.com/watch?v=VGY8FpFohCU From this link, I listened many times and I think that when the reporter is saying "on Chef" she may be referring to an area in which the woman lives. So, "Chef" could be the name of a street or something. Let me know if this makes sense.

It's not obvious. My guess is that it may be a TV program.

no idea