I am not sure how to find it in the videos, but I can point you to an example.
In GPS Watch, look at TrackPoint. It has a reflexive for ordering (in a list). Also, TrackLog has 2 relationships to TrackPoint ‘has first’ and ‘has last’. So, these are the head and tail of the linked list. There are operations that do the insert into the list.
I am sure you know you can get GPS Watch from the Help->Welcome->Quick Start page in BridgePoint.