Tutorial: how to deal with complex shots for camera tracking (Patreon)

[note: the image sequence used in the tutorial can be downloaded from the patreon tier 2,3,4]

Here is the hardcore version of camera tracking: how to deal with it when everything looks like simply not working, what to do to get that solve result lower then 0.5.

Plus: I give you my opinion about using external softwares for tracking.