Timings for this video, if you want to skip ahead:
Intro: 0:01
Recipe: 0:33
Colorants and Fragrance: 1:00
Ready to mix the soap: 2:03
Distributing to the colors: 3:30
Discussion of the mold and lazy Susan: 4:58
Pouring the soap: 5:28
Spinning the mold: 15:04
The finished swirl: 16:26
Next day: Cut bars: 16:37
Other videos showing the method:
https://www.youtube.com/watch?v=PJvKaU22lzs&ab_channel=BrambleBerry
https://www.youtube.com/watch?v=JCsa7wJMQlU&t=928s&ab_channel=BrambleBerry
https://www.youtube.com/watch?v=1nFgldXv2qs&ab_channel=tellervo