Last video is just a commercial spot about British Grove Studios.
Nothing interesting or even related to the recording of the last MK record.
It's funny because I always wanted to know what exactly Mark took from all these amazing studios he worked in, and brought to BG, and I was happy to hear this exact question being answered, only to be immediately deflated to get no specific answers at all. All the usual suspects: Paul McCartney's console, people in white coats, etc.