Thats good to know, but I am a "out of the box" person. I never want to have to manually install extensions as thats just more stuff to remember when setting up a new machine. Yea thats a me problem, but still.
You want to have your cake and eat it too, I think the best solution in your case is paying for youtube
You don't install software on your machines that didn't come pre-installed/configured?
It used to support it out-of-the-box as well, but it's technically against YouTube's ToS to allow this without paying for a premium, so now you need this as an extra hoop.