2) I hate you for making me have to track down and listen to the clip again.[1] (j/k)
3a) On the “Turnout Rates: Age” graph, the 18-29 demo consistently has the lowest turnout of all groups for each year measured.
3b) I count 8 cycles > 20% and 8 <= 20%. No other group is has similarly low numbers.
4) From the link you provided: "Pollsters have long noted that poll respondents overstate their voting participation."
Please let me know if I’m misunderstanding something here.