Hull speed

[Lastreaumont]

I see many comments about how ship's engine power and ship's speed should work according to hull form/size and other parameters. I am not familiar with all the physic involved, so I was pleased when few days ago I discovered this video: 
https://www.youtube.com/watch?v=URgSFglbl5g

1st question, for everyone: am I the only one who learnt something watching it? :-)

2nd question, for developpers: should it be possible to know the approximate optimal speed of a given hull, according to size and beam settings, to optimize engine's sizing? 

Edited August 22, 2022 by Lastreaumont
mistakes corrections

[jw62]

Currently the way to figure out the best setting is to F with the speed setting by increments of 1/10 kts (I've diced it to three decimal places to get it just right) until you find the point where the displacement (because of engine size) Jumps substantially. Go just below that and you've got optimal ship speed, check the cost as well, it starts climbing exponentially early on before going off like a rocket.