Don't know much about livestreaming Mr Musk.
But if to make it simpler, and efficient,
without installation of separate software,
the website should do the work,
aiming for entirety of the user's on-screen activity livestreamed,
or from the camera.
programming = concurrency would certainly help in this case,
asking ChatGPT.
and AV1 seems to be the right codec for encoding.
open source and royalty free. potentially more efficient than
other codecs in compression and quality but lack of support for it.
to also have the website draw resource from user's multi-core environment
as well instead solely relying on the servers may would help....
that is while being livestreamed. with an option to use extra processing
power from the user's computer with minimum requirement of hexacores...