Interesting video. Helped me understand avalanche a little more. One confusing thing though, is he said a few times "there is no mining." I think he means, no mining to validate TXs.
But the TXs will still get mined into the BCH blockchain, right? Avalanche is just a pre-filter on the TX to try and prevent double spends attempts by "locking-in" the 1st seen TX.
It's not sufficient itself to maintain the chain. Also, it was a little confusing when he was talking about randomly picking red an blue. In the real system, it's not random.
There's a True correct choice, the real 1st seen TX, & it's very unlikely a double spend attempt will win the metastable race. So once you see your TX accepted by avalanche