Towards the end of the video he shows that his session was 2 hours and that he did 4 doubles of about 160 m of climbing taking around 30 min. Not counting the 3 routes (about 60 m) he did for warmup, so I guess the session took around 2h30 min in total.
I suspect low level base endurance is a waste of time for competition climbers with a long history of training. But also, Ghisolfi is pretty shit at onsighting on rock compared to most of his peers.
