A fairly good summary of the early history of typewriters and QWERTY by The History Guy. Posted by shinjikun10.
KBD.news Published June 25, 2021
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For most keyboard enthusiast this video shouldn't contain much new info about QWERTY. Still, this is a quite good historical summary of the early typewriters.
A news report in 1905 claimed that the final proposal for the qwerty keyboard was in 1875 by a typist named Mrs. M. A. Sanders who is described as the first professional typist.
(P.S.: Did you notice how hard it is to type QWERTY on alternative and custom layouts?)
This beefy keyboard was part of the Videoton VT-340 display terminal, manufactured from 1972. Check out this picture-heavy disassembly post full of surprises.