Anyone Seen or Heard of These Tracks?

At 00:20 seconds on the video you see a train pass on the second track (left to right). The third to fourth and fourth to fifth carriages have a different sort of coupling. I'm not familiar with this train so maybe it's standard.

Same thing at 00:23 on the train running in the opposite direction. It's a shared bogie arrangement. Here's a clear (ish) look at it......