Liaz 19.40DD - EATON TwinSplitter clutchless shifting

Liaz 19.40DD - Detroit diesel 60 series 12.7L, ~ 500HP Eaton TS 15612 A - manual transmission, 12 speeds, non-synchronized 0:00 - unloaded truck (14t), clutchless shifting 1:08 - fully loaded (42t), shifting with clutch. Notice that the clutch is already de-pressed when I put in the next main gear (1:29 and 1:48) 2:01 - fully loaded (42t), skipping gears, clutchless shifting 4:38 - downshifting