I know this isn’t the answer, however the videos, I assume are listed in the blog link on page Dorico Pro 2.1 and Dorico Elements 2.1 available now - Dorico - Steinberg Forums
Or direct blog link Dorico 2.1 update released, with swing playback and other new features
or…
2.1 What’s New: https://youtu.be/2QOurpge9yY
Swing Playback: https://youtu.be/tvTC52r8nKA
Notehead Editor: https://youtu.be/DIeqabJSyT8
Propagate: https://youtu.be/sjnbqprXChU
Staff labels: https://youtu.be/BWjuA1MQTSA
Rhythmic Notation: https://youtu.be/tYtFNLBFQd8
Slashes: https://youtu.be/-GMVwWAdkP8
Kind regards