Poll: First FB workout you ever did?

In the beginning of 2016, I was looking for an arm workout on YouTube to supplement my workout. I came across the "Tank Top Arm Workout" video (pretty old - Daniel was still doing voiceovers)

https://www.fitnessblender.com/videos/tank-top-arms-workout-arms-chest-back-and-shoulders

I soon noticed that they had more videos on YouTube....and an entire web site...and the rest is history! I feel like a walking, talking FB advertisement, because I probably tell everyone I know about it. I've converted my dad! I've also scared off many from the HIIT workouts, haha!

What was the first FB video that you all came across, and how did it happen? I'm interested to know!