This type of typing exercise is good to become a pro typist.

in this video I have typed a printed written text about proper nouns from an English grammar ebook

This is different than the online typing test and you can clearly see the difference there are no error markers there are no typing indicators and it's much harder to type consistently and with correct form in this way.

it is also slightly boring but this is how real life typing looks like when you have to type letters emails memos etc then you will find your typing speed lacking and you will continue to struggle with typing consistently.
So this kind of exercise is good if you want to be a professional typist or if you are preparing for professional typing test exams

Book author : An English Grammar by William Malone Baskervill and James Witt Sewell. Available for free on project Gutenberg

Видео This type of typing exercise is good to become a pro typist. канала The Typing Lab