Hitting 10,000 subscribers on his YouTube channel was a big moment for Sean Klitzner. So the comedian decided to record a video in which he personally thanked each fan by their YouTube handle.

Armed with bottles of water and hopefully a well-rested voice, it looks like it took Klitzner over 11 hours to complete the task. It’s doubtful that anyone will ever watch the whole video and confirm that Klitzner actually thanked all 10,000 names. But we did give him a quick spot check, and it seems like he’s on the up-and-up.