The Trump campaign put
this ad up on its YouTube page last week. It's the only thing that is :30 seconds and has a disclaimer. I don't know whether this is what he will air.
I do know I haven't been very diligent in updating the Political Ad Megathread because the Clinton campaign hasn't been very diligent in updating their YouTube page with new ads, and the Trump campaign hasn't had any before the one I linked. Eventually, I'll get back around to it, probably after Labor Day, unless the Clinton campaign starts updating more frequently.