Was a solution ever implemented that would allow sorting across multiple playlists as one large list as discussed in:
We post our videos to a YouTube playlist chronologically until we hit the playlist limit at which point we start a new playlist. We'd like TubePress to sort all the playlists (currently 2) as a whole instead of getting the newest vids from playlist 1 intermingled with the newest vids from playlist 2 on the same page. In the post I referenced a possible option named "multipleGallerySourcesMode" was mentioned that would accomplish this but it wasn't discussed further in the topic and I don't see anything in the latest documentation that looks similar. We have TubePress Pro.