You want to look into v2ray for self hosting. For example with https://github.com/hiddify/Hiddify-Manager

Did not work wit gpodder2go, so I installed https://github.com/kd2org/opodsync (docker: https://github.com/ganeshlab/opodsync) again. That seems to work.

I have been using https://github.com/oxtyped/gpodder2go for a while, seems to work and I have not found a better solution yet.

Still looking for a web or desktop podcast player that does sync with gPodder though…

I recently decided to dive a bit deeper into flows since the plugin stacks were failing on me sometimes. Cobbled together something from the examples provided, seems to work fine for me now. Depending the worker it runs on it tries to transcode with nvenc or qsv, if it fails or is not available the flow falls back to cpu transcode.