Hey!
Ok so now I got it to work (I think?) - but I guess it's just really not what I expected it to be!
First of all: in order for the Dynamic Text to work I first had to put a "Collection" element on my page and then place a Dynamic Text Element inside.
I made an FAQ Collection and was hoping I could create some FAQs with their respective answers that I could use on some pages, and on some not.
However, it seems that the Dynamic Content is not intended to work like variables in programming. It is not possible (or at least I didn't find a way) to pick only one item from the Collection that is displayed, as it is showing all items with the selected field. If I do want to filter, I would need to put up a "Dynamic Filter" as well and users would need to query.
Sadly, that is not what I hoped the Dynamic Text would be and honestly, with that functionality, I do not see a fiting use case on my website then.
About the video: no, they did not put the video in the hidden content, so I am not able to see the screencast video they we're talking about...