I don't think that I've ever seen someone put out a video on "how and why to use Sandbox Mode". Here it is, hopefully I don't mumble too much.
I also show a practical example of using Sandbox Mode: developing/testing a build that I'll be using in my Zen playthrough. I don't always do that, it is exceptionally handy though.
There are 1,726 views in 106 videos for Dyson Sphere Program. His channel published over 2 days worth of content for the game, or 77.47% of the total watchable video for Dyson Sphere Program on Whisper DSP's YouTube channel.