Since I just KNOW some pedant is going to complain about it, yes, I know that there is an "OPUS Reader" USB device that you can use to load passes onto your Montréal Metro OPUS card.
However, it has been discontinued and they plan to replace it with an app "some time in 2024".
Explaining all this in my Montréal video would have been an irrelevant aside in a video that was already way too long, so I cut it.
I'm posting this only as proof that I knew all this before the video was released. 😉