This video just drive home that using isospin and hypercharge is like using epicycles to describe the motion of the planets: It works, but it's overly complicated, and it's better to just use the actual thing (quarks, and heliocentrism).
> using isospin and hypercharge is like using epicycles to describe the motion of the planets
No, it isn't; those are actual quantum numbers of the electroweak interaction below the symmetry breaking energy (the other such quantum number is electric charge).