I don't think that it is very likely. It would put a stamp on six amazing drummers saying "ALMOST the new DT drummer, but too bad". While it surely is an honour to be picked for the audition, given the common behaviour particularly on the internet, it would have a bad effect on those six drummers that wouldn't get picked.
Also, it would be quite a new thing, because as far as I know, no band (at least none I know) has released footage from auditions for new musicians (except for Metallica in SKOM).