For context, this is a nice interview about harpsichord and fortepiano: https://www.youtube.com/watch?v=0pdBNkgdUJc

And here’s some general explanation of well temperament on a piano: https://www.youtube.com/watch?v=lNY7Eyntlt0 https://www.youtube.com/watch?v=bC8p1PmB6sk

(Watch those last ones if you want to understand why 18th and early 19th century music sounds so lackluster on equal tempered modern pianos.)