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Discussion on: Do online video streaming sites use TCP or UDP

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Ben Halpern

I believe UDP is ideal for teleconferencing for the reasons you described, but for live video like Twitch and other live video streams, the content is first sent to a CDN and then distributed from there where the HTTP transfer is more native.

Not exactly my area of expertise at all, but I think that's the main difference here. Twitch etc. will run through a service like Akamai.