In this video, part three of the series, I talk about how smart contract blockchains such as Ethereum allow developers to play with levels of decentralization in the smart contracts they deploy.  For example, although Ethereum is "censorship resistant" due to it's blockchain consensus system, it is perfectly possible to release smart contracts that are highly centralized, under the control of one entity, and therefore vulnerable to censorship.  For example, it was revealed during the Compound bug that Tether can "freeze" transfers on certain balances in the way that traditional banks can freeze accounts.  I also talk about levels of "arbitrariness" found at the different levels in the blockchain.