Due to the nature of the achievement, I can explain what I consider to be the trickiest parts, but I recommend that you watch the full run if you are having trouble completing it in under 60 minutes as any little sequence can be useful in this case.

If you need help, ask in the comments below. I will add any useful info here too.

Chapter 1 (0:00)

• 3:00 - Walk behind the bucket then move slightly towards the camera and jump once you see a creature in your way, it should be the only one.
  
• 5:45 - Make sure you have stamina before this part, then run and jump a couple of times when you see the door to avoid the enemy. Safer but slower method is to wait for the enemy to walk to the left.
  
• 10:00 - Walk a bit closer to the camera from the centre and jump once per creature in your way.
  
• 10:20 - Try to be between the cart and the level barrier to avoid being slowed down by touching either.

Chapter 2 (11:25)

• 16:30 - Run and jump behind the enemy then hide around the hole in the wall on the side opposite of the room the enemy is in.
  
• 17:40 - Make sure you have stamina then jump as far as you can. Do not jump whilst in the pool of shoes.
  
• 18:15 - Jump a few times to ensure distance away from the enemy. It can actually magically pull you back if it starts its kill animation, which is annoying.
  
• 21:00 - It's possible to combine 2 of the 3 actions I do in a single alarm but I choose to be safe here.
  
• 22:40 - Try not to alert the enemy, walk slowly around objects. If you do, make sure you alert it from the right side of the room away from your destination.
  
• 24:00 - It's safe to run and do so under the book shelves to save time.
  
• 25:40 - Move as soon as the hand touches the wall; once you drop, make sure you position yourself a bit closer to the camera from the centre and jump on your way to the door.
  
• 26:10 - Wait for the enemy's left hand to touch the middle standing where I do, after which it is safe to pull the pieces of the cage - first is further away, second is closer to the camera.

Chapter 3 (26:50)

• 29:30 - As soon as the enemy passes you, walk to the hole in the wall so it can see you and get alerted; then progress through to the right and run all the way to the stairs closer to the camera, then quickly up the shelves. You can save A LOT of time in this sequence.
  
• 31:50 - Drop the key in the wall opening then walk to the left room to alert the little creature and with it the enemy. Once enemy is distracted, it is safe to progress to the door and unlock it.
  
• 38:20 - Alerting the enemies and dropping under the room again will save you time waiting for some of their animations. Run up once you are sure you can make it up the stack of dishes, they won't reach you with their short hands.
  
• 40:00 - Once up the hook, drop as far as you can then jump every other second or so to maintain safe distance from the enemy. Jump up without moving forward for the final hook.

Chapter 4 (43:05)

• 44:50 - You can walk closer to the enemies than you think, but make sure to jump way from their hands if needed. Reduce the jumps to as few as possible because you can also drop from the table, having to redo the whole thing again and losing time.
  
• 46:05 - Walk furthest away from the camera on that platform and jump from the boxes under the little table. Then jump at least once more or the enemy will catch you. Remember the wall opening is closer to the camera in perspective, rather than further away from it.
  
• 48:00 - Remember to jump often. Jump towards the camera when you reach the door after walking under the table as you can hit the wall otherwise and enemies will swarm in behind you. Jump from the stairs too.