That's a chronic issue. It's even worse, with printed materials.
Things move so quickly, in tech, that something is out of date, almost as soon as it's published.
I've been training for years, and setting up a syllabus/course is a big job. Often, my subject matter may be "old hat," by the time I am ready to give the course.
That often means that I don't teach "bleeding edge" stuff. When I take those courses, they tend to be mighty "scruffy," with ill-prepared instructors, and lots of "Well, it worked this morning..." stuff.
The same goes for topical material in walkthroughs and tutorials. If they are relevant, they are likely to be "scrappy." If they are good, there's a fairly high degree of confidence that they will be out of date by the time I see them.
Nonetheless, I have gotten fairly adept at translating "dated" stuff to my current circumstances.