yes it is! YouTube in itself is a tremendous time waster.
Unless you’re learning to do home repairs of course.
But just chasing tail to hear some guy/girls “special info” ? Nope count me out. I actually have stuff to do most days.
There’s all kinds of fascinating stuff on YouTube.
Hillsdale College has lots of free lectures on the American Founding and history.
Lots of classics are on YouTube in ‘audiobook’ form.
TED Talks can be good.
I guess it all depends on what you’re interested in and bother to look for.