Missed It By ...

... about an hr.

"It was around 11:30 p.m., so I played some mellow improvised chordal stuff," he wrote under the YouTube video. "I'd been busy the whole week, I never had the opportunity to play music, until right now!"

We saw the art-piano (conveniently located between the Starbucks & Subway [The sandwich store, not the Red Line.] in Union Station) about 2230, while returning from the ball game. Wasn't in use at the time.