The webcasts for the 2018 STScI conference on precision astrometry are here:
https://webcast.stsci.edu/webcast/searchresults.xhtml;?searchtype=20&eventid=268&sortmode=2
In today’s call, the talks by Gary Bernstein on DECam astrometry:
https://webcast.stsci.edu/webcast/detail.xhtml?talkid=6075&parent=1
and Dana Casetti-Dinescu on LSST astrometry
https://webcast.stsci.edu/webcast/detail.xhtml?talkid=6110&parent=1
were mentioned, but many others seem to be of interest.
John