The only parameter you are required to set is the name of your stream,
but we also highly recommend that you define transcoding profiles
parameter that suits your specific broadcasting configuration.
If you do not define transcoding rendition profiles when creating the
stream, a default set of profiles will be used. These profiles include
240p, 360p, 480p and 720p.
The playback policy is set to public by default for new streams. It can
also be added upon the creation of a new stream by adding
"playbackPolicy": {"type": "jwt"}