Nothing Woz says in the interview is false, but he's being very careful in what he says.
He buys uncut sheets from the treasury, pays a printer to make them into pads and so on, and then sells them to random people at a loss just for the fun of playing with their minds :-)
"By law it's legal tender" - true because they're genuine
"I get a printer [...] to make these pads" - they make them from genuine bills
"I'm not sure if it's the right President" - white lie, it is
"The serial numbers look suspicious" - yeah because they're sequential