Tcc engages partially at lower speed with low power input, e.g.
If you press accelerator gently, tcc will have partial locked in 3rd and 4th at 60kmh
However if you press accelerator more, the tcc will be deapplied till power and cruising becomes equalized where it applies again and usually more than 60%
At 80 kmh and above (e.g. 120 kmh) in gentle cruise
The tcc will fully lock 100% (as seen in video)