sorry I did not watch all through the vidz

So you read this section (just hold your mouse over the item and you will get popup info):

Aux Busses

Each track's mixer channel strip also has four assignable AUX knobs that let you individually control the send levels for up to four auxiliary effects on each track.

There are eight Aux (auxiliary) effects busses in the Mixer window. Each allows a chain of up to four effects.

You can adjust the Send level, Return level, and output port destination (audio port or subgroup) for each bus.

The [FX] (effects) button at the top of each Aux strip brings up the DirectX/VST Window so you can select effects or edit effects settings.


Effects can also be applied to the individual audio subgroups and output ports.

Each subgroup and audio port has an FX insert, with slots for four chained effects.

This is useful if you wish to apply special effects to a selected group of tracks, or apply them globally to the final stereo output.

more here http://www.soundonsound.com/sos/sep11/articles/qanda-0911-5.htm
http://www.soundonsound.com/sos/feb11/articles/dp-workshop-0211.htm