This is a tutorial for the "Three NEW Puzzle Rooms!" video. I realized after working on this that I had already done a tutorial for these here: https://youtu.be/JtOCYb_Wj3I
This one is way better though!
Many thanks to LrgLongTrousers for editing this video!
Intro 0:00 - 0:34
Showing off the Rooms 0:35 - 2:16
Ice Room 2:17 - 5:31
Decoder Room 5:32 - 29:12
Music Room 29:13 - 48:35