Andrea Corallo <akrl@sdf.org> writes:

[...]
>
> I'd like to upload the recording on some free software based streaming
> platform but I'm totally lost on the subject.  Any suggestion?
>
[...]

Since you're already an SDF member, you can email their membership@ and
ask them to create an account for you on https://toobnix.org.  That's
where I've mirrored the videos from EmacsConf 2019.