Quite possibly the funniest gym/workout video I've seen in a long time, work it out baby is a video by YouTuber, gradualreport, who makes some very sharp and witty comedy videos.
If you've ever been to a gym or got into the whole physical fitness thing, even for a day, you'll get a laugh out of this video. It's a little bit on the 'adult humor' side but nothing that you wouldn't consider 'childishly funny' by the end. I hope you find it 'laugh out loud' funny like I did.