Cannabis.
Family-Plantacae.
Genus-Humulus (used to be specified otherwise but DNA profiling has recently increased our understanding)
Species-Sativa, Indica or Ruderalis.
Varieties and Cultivars-White widow etc.
We simply call 'Varieties and Cultivars', 'Strains'. It's easier. Simples. Even these lines are blurred dur to indica/sativa mixes and different strains (sorry, technically Varieties and cultivars) produced from different manufacturers with differing genetics.
As for Mr Cervantees (whom I have serious doubts that you have ever spoken to outside of an imaginary world after too many bong hits), he was good in his time but I'm sure Im not the only one on here who has seen his vids and thinks 'I could double that in the space'. He had a good, solid understanding of light/vent/feed neccessities but very little of maximising yield. No disrespect to the guy, a simple, straight grow is good but there are a lot of us out here who need to push it to the limits due to space/leccy bill etc.
Put him up against Heath Robinson with the same space/watts and see what you get.