For example, if in year N youtube has f(N) new video. Let assume f(N) = cN^2. It's a crazy rate of growth. It's far better than the real world Youtube, which grew rather linearly.

But the rate of "videos that are older than 5 years" is still faster than that, because it would be cubic instead of quadratic. Unless the it's really exponential (it isn't), "videos that are older than 5 years" will always surpass "new videos this year" eventually.

Those would be the worst of the lot regarding how valuable they are historically for example. Engaging BS content...

    I met a user from an antique land
    Who said: Two squares of a clip of video
    Stand in at the end of the search. Near them,
    Lossly compressed, a profile with a pfp, whose smile,
    And vacant eyes, and shock of content baiting,
    Tell that its creator well those passions read
    Which yet survive, stamped on these unclicked things,
    The hand that mocked them and the heart that fed:
    And on the title these words appear:
    "My name is Ozymandias, Top Youtuber of All Time:
    Look on my works, ye Mighty, and like and subscribe!"
    No other video beside remains. Round the decay
    Of that empty profile, boundless and bare
    The lone and level page stretch far away.