The video describes Delegated Proof of Stake (DPoS), not the type of Proof of Stake mechanism used by Ethereum.
The difference is that in DPoS validators can be as big as you like, as you described, with the community giving staking pools their power.
In Ethereum a validator does not get more power from having more staked ether, if you want to get more rewards you need another 32 ether to set up another validator. There are ‘pools’ which work more similarly to DPoS, most notably RocketPool which allows anyone with 16 ether to set up a validator and receive the other 16 ether needed from the community… however this isn’t natively how the network operates, it’s a decentralized protocol built on top of Ethereum. There are also centralized actors like Binance and Lido that accept other people’s ether to stake with, but again, they aren’t setting up big validators with loads of ether, instead they set up loads of validators, each with 32 ether.
I think you’ve understood Cardano’s DPoS system and maybe just assumed that was how Ethereum worked as well?
