Socrates to Plato perhaps: maybe I'm just old but using text to pass information is just making your memory weak.
different people prefer different methods of learning
they may or may not be more effective -- just that they are more preferred -- even if for no other reason than ease
sitting down with a page of text and focusing on it to learn new information is becoming harder and harder for me personally ...with the bad habits of constant smartphone and social media use
I fall back to have someone do the reading and explain it to me
videos let us pause / rewind / skip / slowdown as needed ..so I am noticing that I am depending on his control also and sometimes zoning out of videos too ...
...which sometimes bites me when I am watching a live stream that has no rewind or worse ..attending a real meeting and hear someone explain something at length
Visual content is a bonus, to remain more engaged and maybe impart information via a third medium
On the contrary to your suggestion, blogs (or more specifically, webpages) are what can do more than anything else, since they can also feature interactive media. See <https://ncase.me/trust/> for an example.
Whether or not this is expected, standard, or the author thinks it's worth the effort is another thing.
Unless we're actually showing audio-visual phenomena, a page of text is almost always more useful to me. I can absorb it at my speed. I can go back and forth within it easily. I can search it. I can copy bits out if I need to. It's just better.