I've never understood the reasoning behind the SC community claiming no loading screens when it takes circa 20 odd minutes to fly to another planet and variants of time above and below this.
As Mr Hat states I also do Not understand this misleading post title, although I did enjoy the video pointless as it was.
Pug
To be honest FDEV probably had a choice, put in a jump and use it as a loading screen, or put in a fake half a minute of flying through space and pretend it's seamless. At the time they made a choice, to use a jump and use that to load the assets. Seamless would require the ability to cancel the transit at any time and at that point observe any assets in range, SC does give the ability to cancel the transit, but then you have to initiate another transit to get anywhere, so no, not seamless, just the pretense of seamless.
Honestly there's enough trickery around that FDEV could easily have pretended to seamless but they chose not to, I think it was a good choice.