[evgen]

Assume you are on a call with three other people. Alice has a solid connection and you can deliver best quality video to her, Bob is on a low bandwidth connection from home and you will need a better compression ratio for him because he can't handle full bandwidth, while Carol is on a shit mobile connection that has high latency, low bandwidth, and drops packets. For each of these you would want a different encoding scheme and possibly very different packet sizes, but if you are sending it from your desktop at home you would basically be sending almost 3X the amount of data to handle the three different streams (plus the additional CPU for all of the different compression steps) -- Zoom sends one stream to their servers and then re-broadcasts at different compression levels and different packet schemes to give the best result for each user.

Justifiable, but in no way shape or form is this E2E encrypted and any company that makes this claim is committing fraud.

The tl;dr of "Zoom E2E Encryption Explained Like You're 5" is rather simple: "It isn't E2E encrypted"

[ajconway]

Sounds like a good use case for Scalable Video Coding https://en.wikipedia.org/wiki/Scalable_Video_Coding

[efreak]

> A subset video bitstream is derived by dropping packets from the larger video to reduce the bandwidth required for the subset bitstream.

How do you combine that with worthwhile encryption?

[ajconway]

Do you mean that it will leak additional information due to compression?