In case anyone else wants to watch: the weak force isn't mentioned until just after the 45-minute mark. I haven't got to the strong force yet but it presumably

In case anyone else wants to watch: the weak force isn't mentioned until just after the 45-minute mark. I haven't got to the strong force yet but it presumably follows. Edit: so for weak, I think I understand that "photons are massless, so are only subject to the inverse-square law; weak bosons have mass, so are also subject to decay". But that doesn't explain to this dummy how the strong force works, since gluons are also massless (... though mesons are not? but they're not fundamental).