If you do the complete workout it is about 40 or maybe 45 minutes. You can choose to do only the last 4 minutes versus the whole 12 minutes of the warmup. Also I always skip the arms and abs, as I have other workouts I like for those.
Unfortunately, the whole workout is on the floor except for the main part of the warmup. No equipment needed. It's a lot of leg lifts, but he has you keep your foot flexed and straight and that really makes you feel a burn in your butt. It's actually fun and I can't believe I'm not bored yet. But if you hate floor exercises you won't like this.
ETA: My butt is very flat and I am starting to see some lifting and I'm excited. I've got a ways to go yet though and I don't know if my butt will ever get where I would like it.