I do wish, for the most part, things on the 'net had posted dates. Not writing, necessarily, about youtube.
As an example, trying to figure out how to do something in C#/MVC. Search the net... waste a LOT of time... FINALLY!!!, finally I find something. Working thru the example only to discover the content is out-of-date, years old, etc.
Above also applies to just about any hobby I enjoy.