Exellence.
Amazing quality.
Great subjects.
Great storyteller.
Like if Cracgenford had exceptional visuals.
Man is a legend amongst youtubers, just like Casey Neistat, in his own category, which is documentaries. 1.3 million subscribers but 20 million views per video, showing that his videos always reach Recommended list. When Lemmino posts a 20 minutes video, YouTube takes a 20 minutes break, watches his video, then everyone goes about their business.
Others I would recommend: MindField series from vSauce, Kings and Generals, Fall of Civilisations, Cracgenford, Vaccine -The human story.