When will the youtube and other websites start to pay us with bitcoin?
When btc becomes more popular and trusted by many people, then youtube or the other websites will pay btc for you but it will take a long time for that to happen. Now it is almost impossible because not everyone is getting btc instead of cash.
If everyone understands Bitcoin, the more and more people are trading by Bitcoin, I think most countries can use Bitcoin payments as a currency.
if bitcoin is known by many people, of course the longer bitcoin will be more developed and used for everyone's trading, and of course, over time YouTube can use bitcoin for payment.