He really has many interviews
This is a classic:
Decentralizing Everything with Ethereum's Vitalik Buterin | Disrupt SF 2017
And this one, by Ethereum co founder Gavin wood
Ethereum - The World's Computer" - Gavin Wood
You can read it for free here
https://github.com/ethereumbook/ethereumbook
I also made this post about ethereum fees;
https://bitcointalksearch.org/topic/m.34270190
I finished watching the Vitalik interview, I'll watch the other one later (and may come edit this post if it's worth adding another note).
Ethereum is definitely an interesting beast on its own. If you consider functionality, while Satoshi may have created bitcoin for a specific goal, Vitalik definitely outclassed him using ethereum considering how much practicality it provides. We can already see it from the flow of tokens and icos based on ether that are popping left and right, which while it might look like a bad thing from an economic standpoint, I honestly think it's a drive in the right direction to come up with truly innovative ideas, that can bring decentralization & smartcontract-driven rules to more software we use in our daily lives.
As for the book it's a shame it's not a pdf, so I might not read it as soon as I could, but I'll add it to my list, I'll definitely make more time for it down the line.