It is a bit of an exaggeration to proclaim the death of Youtube, but given the recent changes in how advertising revenue is shared out amongst content creators it is entirely possible. At least in the long term.

For those who have not been made aware, Google has changed how advertising revenue is shared out to content creators, which has resulted in many creators losing incoming; sometimes significant amounts. The intention appears to be to pay advertising revenue to those content creators that advertisers like, which sounds fair enough. But the unintended consequences :-

1. New content creators will be discouraged because their advertising revenue is likely to be so low as to make it seem impossible to make money with youtube.
2. Existing content creators who are not ridiculously popular will also be discouraged, and are likely to look for alternatives to youtube that will maintain their income.
3. Content creators will be encouraged to make middle-of-the-road content that nobody finds offensive, advertisers like, and is popular with the overwhelming majority; in other words just like ordinary TV. Essentially this discourages the kind of content that makes youtube interesting (or at least not as boring as broadcast TV).

Now would be a great time for a competitor to jump in, and encourage content creators to jump ship with a revenue payout mechanism to encourage creative content producers – the small ones and the innovative ones – yes this will mean the larger content creators will lose out, but perhaps they can afford to.