Not to defend them, but he did follow up with this:

This is referring to the technology we just released into BETA for premium subscribers, which delivers one of the lowest latencies for livestreaming (significantly better than YouTube’s latency).

This does not refer to encoding

https://xcancel.com/chrispavlovski/status/1856090182275215803

Although quality != latency, so idk.

TCP and UDP can listen on the same port, DNS is a great example of such. You’d generally need it to be part of the same process as ports are generally bound to the same process

They don’t even need to be the same process. I’m pretty sure that’s just a common practice if something needs both protocols, but there’s nothing stopping you from having a web server on TCP 443 and a VPN server on UDP 443. Ports are an abstraction brought by each protocol, they aren’t in anyway related.