Thats less individual players(still matters though) but more how teams use their resources.
This vid seems to be from the ardent meta, so ALL the resources in proplay got funlled into the adc, meaning he will take jungle camps and **EVERY **big wave that makes it's way into your territory.
In lower elos, you usually have top sitting top all game, bot pushing bot and maybe tansitioning mid at some point and mit staying mid and take any CS they can get.
In proplay, you rotate players around and allow your carry to catch enemie slowpushes while guarding them with vision, midlane usually the adc is allowed to farm unless the enemie threatens your tower and you want the waves gone asap.
This has changed a bit with mid and top beeing hardcarries aswell, but especially duering the ardent days, you really wanted that gold on your adcand the rest were 3-4 'supports'.
Just look at his toplane Cho's farm, ~230 cs in 50 min, mostly cause he allowed rekkless to farm the big waves mid/late