I think the only way to do this is as a client setting.

For example, I have this on iOS but other plex players have this as well.

However, I’m not sure if this will force a transcode or not

At some point it probably does. And can probably catch fire. Mine were fine once they cooled

Generally much less effectiveness to almost none as they get hotter

Source: was an idiot teenager

What would be the point of registering across all servers? Is this just to secure your username?