The trailer was wrong, it was always meant to be 22.35, and yes the prog after the news will always aim to start around 22.37-39 (and they won't bill it later as they want to match the BBC1 junction sadly). The late news however often gets extensions as it can be rolled through the night so sadly it makes the situation even worse...
Having just watched the recording, I was very impressed and will carry on watching the other seven in the series.
There's also a lot of material on the Wales version of ITV Local.
The archive of Gwlad y Gan (Land of Song), both in the initial programme last night, and on ITV Local, includes footage of one of my teachers and a couple of the pupils who I went to school with.