From 26:32 (older version C4D)
In Motion Tracker Bottom R corner: 2D Tracking → Manual Tracking
Hold Ctrl + L click on screen to create tracker point (then adjust the inner square to cover the whole tracker point wanted)
Repeat the steps by adding few more tracking points (recommend about 7 trackers) → Select the tracks in the box below, click Manual Track button above the box
After the analyze, manually fine tune all the trackers in the box throughout the whole clip timeline
Next, go Tracker (Top bar menu) → Object Tracker (or at bottom) → Select all tracks in the box from Motion Tracker layer → back to Object Tracker layer → Tracker → Assign Selected (Trackers will be pasted here) → Reconstruction → Run 3D Solver for Object
Create a Null →Put it in Object Tracker in layer → R click on Null → Riggings Tag → Constraint → Tick PSR (stand for Position Scale Rotation)
Then can’t follow, maybe coz Run 3D Solver for Object can’t be done
Drag User Features trackers (should created when the Null placed under the Object Tracker, I don’t have it) to the
Target at PSR (6:45)
On the Null layer, press Shift+C (Enter command: Reset PSR)
Then the Null should align on what the tracker we want...