Proxy Environment Variables

How does one go about setting up the http proxy?

I would like to know as well.

My questions are:

  1. In this context, does HTTP really mean HTTP(S)? Or are we doing all this just for unencrypted communications?

  2. Are there paid proxy solutions?

  3. Is squid an example of what I should use?

  4. Can I run squid on the same virtual machine as PeerTube? Or does it have to be on a machine with a different IP?

  5. @JohnLivingston kindly explains here that private URLs refer to internal paths on the webserver. To be clear, this means « private URLs » have nothing to do with videos listed as private?