In written form — as long as there is a common language/ability to read, and a willingness to read too — ideally followed by a discussion (most preferably IRL, as you can easily see the other person's emotions and adjust your own communication to it) about whatever was read.

The (lack of) willingness to read is something that worries me a lot.

Not because I I see so many younger people focusing on YT content (or on any de-Googled version of YT), videos are a great tool and they have a legit place in most teaching/learning but they also can't replace books. So, when I see so many younger people using videos only, as well as many people my age who so easily have forgo books too), and when you start realizing university students seemingly cannot read books anymore... That's an issue. A serious one.

I'm also surprised people seem to not realize how much more efficient a text (be it a book, or an article) is compared to a video when one wants to study something, aka work on it and not just watch it for fun.

And even for fun, this time it's purely a personal preference: I prefer reading a text (and let my own brain/imagination decide what the characters or props look like), than watching it and being told that they look like this or that.

It may also be that I'm one of those old 50+ dude that don't get it and just don't realize how much better/cooler videos are compared to books. I doubt it, but I'm willing to admit I don't get it.