Thought this might be an interesting watch, considering that I've been having lots of fun reverse engineering a ds1054z lately.
https://youtu.be/Tk_3rYKWIIg?t=826 looks a lot to me like that is the main CPU of the whole thing -- that's a freescale MC i.MX, the same series of processor that powers the ds1054z. Hopefully a rather newer one ... nope. it's the i.MX283, very very similar to the i.MX286 that powers the ds1054z scope. Freescale considers that a legacy processor, so I'm rather surprised they went with something so old.
There's also both RAM and flash on there. Nicely, they've given us a couple of nicely marked 0.1: unpopulated connectors on the top -- ARM-JTAG and BOOT.
I also wonder a bit if that's a real PCI card. It's not out of the realm of possibility, and it'd be somewhat handy during product development.
Also, note that it's called DigitalBoard in the silkscreen, not IO, or peripherial, or back-panel or the like.
(And there's the same 5-pin diagonal FPGA JTAG connector.)
... yeah, he's coming to the same conclusions as I did, just a bit slower.
Anyway, the design is very similar to the scope, in terms of what chips they are using. The difference is that they've moved to more boards, which means they can mix and match better and hopefully put out products quicker. I am still surprised they've gone with such an old CPU, though.