Uhmmm the "Oscilloscope tutorial" search I just did on Youtube, returns always the very same stuff; definitely usefull for a beginners but not really "appearing now".
I may be mistaken, but I take this as "They use CROs!"
A) The nice thing about CROs is that, some specialty/very high end units aside, they have have the same basic control structures. The basics, triggering, horizontal sweep rte, vertical attenuation are all fairly common and accessible without digging through menus and context based controls. Learning on one scope is generally applicable to all. As well, the basic concepts are still there in today's most sophisticated digital scopes. Triggering, horizontal sweep rate and attenuation are still the bomb, as it were.
B) What "modern" scope would you base your tutorial on to make it a "just released blockbuster"? Maybe the new Keysight? Sure, then when our young newbie buys a Rigol or a Siglent, tek, GW Instek - whatever - and is then thwarted by the fact that Keysight hide that control in a different menu that the others and call it something else, or give some basic function a completely different UI. What to do? Re-do the tutorial series for every brand of scope on the market?
If the newbie really has no basic concept of what a scope does, how are they to decide how to apply what they learned on a Keysight to the Siglent they just bought when the front panels are dissimilar and the menus are completely different?
Interesting problem to solve..