Still, I would like to have an equal list of non GAFAM channels, heh.
I know "The Linux Experiment" (the best of those channels IMO) has a peertube: https://tilvids.com/c/thelinuxexperiment_channel
FYI: I'm linking to their home location, but you can follow them from any Peertube instance. I'm on Tilvids and follow all of these folks from there so I don't have to jump around to multiple places.