This series is from Grey Cook and I absolutely LOVE it. It's a staple mobility movement for all my teams at Mason, especially while they're in-season. The very first and very last portion that gets cut off is simply an overhead stretch (lift your chest and straighten out your arms).
The sequence is very time efficient and takes care of mobilizing everything you need to prior to a squat session like these NAAAASTY speed squats I did a couple years ago: ...I used to be able to move some weight.
This mobility series also works great at home should you find yourself monitoring a small child's breakfast and not actually eating yourself: Okay, I know that was a reach, but I really wanted to post an Arabella video - it's Friday, after all!!
Give the Squat Mobility Series a go - your entire posterior chain and your hips will thank you!