Go back and look at it again about a dozen times. Go to the bottom of the picture where it says "source". There you can stop the video. Stop it a few times. You'll see the block itself separated just above the crankshaft. Crank, bottom 1/2 of the block, con rods and cam all stayed in the engine compartment.
Pistons stayed in the top part of the block with heads still on. What you see at the end, is the top 1/2 of the engine and are looking up into the cylinder bores from the bottom side. Head are still on top of that part of the block.