Nota
There are a finite number of meeting channels so that meetings are spread around. This is enforced by infra. The #openstack-meeting-cp channel is special in that it is dedicated to cross project efforts.
Join the channel of the project(s) you are interested in and find the logs from the most recent meeting.
Look up when the next meeting is for the channel you joined and where the meeting is conducted (#openstack-meeting, #openstack-meeting-3, etc).
Look through the list of mailing lists and subscribe to at least one list of interest. Once subscribed, locate the archives for that ML.