irma-crypto.pdf contains the slides of the talk. You can build the pdf directly from the tex file. You can set the setbeameroption to either show the slides (hide notes) or the slides with notes (show notes on second screen) or only the notes (show only notes).
brew cask install mactex
Then add the mactex location to your $PATH variable.
Run presentation with
pympress irma-crypto.pdf
A couple of tips where to look for LaTex instructions when working on the slides.