That’s precession, in other words the speed the Zodiac signs change re: the day of the year.
From Wiki, talking about axial tilt:
scillates between 22.1 and 24.5 degrees on a 41,000-year cycle. It is currently 23.44 degrees and decreasing.
Ypu are correct. I had forgotten that in addition to the “roll”, there is also a bit if a “pitch” to the axis. This documentary must have been talking about that. My bad, I pulled the trigger without thinking it through.