Barack Obama on Trump's crowd size obsession

The Obamas headlined the Democratic National Convention last night, and the funniest moment was the former president wisecracking about the other former president's insecurities. Embedded below, the long and short of it.

Previously:
Republican news camera calls Donald Trump's bluff when he brags about crowd size (video)
Crowd-size envy: Trump obsesses over his limp crowds while Harris crowds explode (video)
White House insiders: Trump ordered Sean Spicer to lie about crowd sizes because he was 'demoralized'