Apparently, I missed this one earlier - it came out about a week ago:
The Corrupt Origins of Central Banking in America | Thomas J. DiLorenzo
https://www.youtube.com/watch?v=7skpPEhiyl8
It looks like they're forgetting to add some of their uploads to
the Mises University 2015 playlist.
(So far, they have uploaded over 50 videos for Mises U 2015 - but their playlist only has 45 entires at the moment.)
They might not upload a video for the "Evening with Judge Andrew P. Napolitano" presentation.
(I think some of Judge Nap's stuff like that is exclusive for attendees at Mises events. However, the audio is available - see the OP.)
Garrison's "Austrian Capital Theory" is late and as yet unaccounted for (as is perhaps the case for Hülsmann's "Fiat Money, Finance, and Production").
Other than these items, I think I have accounted for all the videos they've uploaded so far (there are still ten or so left to go) ...