Create a restream for a channel

A restream pushes the stream of an ingest or engine of a channel to an external RTMP or SRT destination. Restreams are only available when restreaming is enabled for the organization (403 feature_not_enabled otherwise). type: ingest restreams the incoming stream of an rtmp-push or srt-push ingest of the channel as-is; the target must use the same protocol as the ingest (rtmp:// or rtmps:// for rtmp-push, srt:// for srt-push). type: engine restreams the output of an engine of the channel; only rtmp:// or rtmps:// targets are supported. Returns 400 restream_source_not_found when src is not an ingest/engine of the channel, restream_source_not_supported for other ingest types and restream_target_not_supported for a protocol mismatch. Restreaming is not available for every organization, ingest or engine region (400 restream_not_supported resp. restream_source_not_supported otherwise). A new restream is stopped: start it to begin pushing.