clearly this dude lifts, he's lifting in other videos on his channel.
I think he's saying that doing 20 pushups a day will get your chest looking right
but I do know that Rickey Henderson was notorious for not lifting weights, and he was built like a tank from just doing sit ups and pushups:
Rickey Henderson’s Still Training
"Henderson’s philosophy: Keep it simple. His daily routine consisted of 120 pushups and 200 sit-ups.
“I did some curls, but I didn’t lift weights a lot,” Henderson said. “I was never a big weightlifter. I did a lot of situps and pushups more than anything else.”
during one game i was watching while he was with the blue jays, the announcers were talking about how he would do 200 push ups before bed