26-ji no Masquerade (26時のマスカレイド)
Again this was released only on live concerts during the 3rd Anniversary Tour, and available for purchase only if you had some sort of certain type of an ticket called S Ticket (Sチケッ).
The first day of the tour seems to be from 2019-10-30 so most likely that is the first date when you could get one aka. the release date.
Name of the DVD should be something like this:
1-paku 2-ka, Cottage Camp Shite Mita. (1泊2日、コテージキャンプしてみた。)