Like I said I'm not planning to go back and re-watch the entire video to make a list (I'd be writing an entire essay), but here's one illustrative example I noted the first time I watched it:
"[Proof of Stake] suffers from delays when elected validators are offline and the system needs to draw again."
It's easy to look at a poorly designed Proof Of Stake protocol and point out flaws. But since his beef is with PoS itself, I think it's fair to measure his claim up against Ethereum's beacon chain which is considered to be one of the better PoS designs:
* Ethereum's validators are self-chosen, not elected.
* There is a ~99.5% participation rate, meaning that 1 in 200 slots are missed. Offline validators are very, very rare.
* When this 1 in 200 chance occurs and a slot is missed, Ethereum's elastic block size mechanism (EIP-1559) ensures that the chain catches up by effectively adding additional capacity to the subsequent blocks.
* Whereas this slight unpredictability happens very rarely in Proof Of Stake, it happens constantly under Proof Of Work. This is because PoW is an inherently unpredictable poisson process. Thus, PoS is a substantial improvement over PoW in this way.
* The result of this 1 in 200 fluke is that your transaction takes 18 seconds instead of 6 seconds to reach preliminary finality. And that's only for Layer 1 transactions which are by their nature high-value; Layer 2 transactions enjoy quicker and more predictable soft finality.
I also remember there being issues in his economic analysis of PoS, an unwillingness to engage with scaling technologies (hand-waving it away as based on nothing), no mention of for example Secret Shared Validators or Rocket Pool as solutions to the solo staking minimum, no mention of the history or state expiry roadmaps when discussing the growing size of the chain. Those are just some more examples, reconstructed from some old notes of mine I found, without me spending too much more time on this.