Starting a channel will make it ready to receive an RTMP(S) ingest. The channel ID should be passed in the URL. An optional parameter
rtmpPullUrl can be specified in the body to enable pull-based streaming. Note that this body parameters in deprecated, please refer to Update channel on how to use the
ingestPullUrl instead . When nothing is specified, the currently specified ingest type ("push" or "pull") will be used.
Stream content before starting channel
Make sure to stream content before starting the channel!