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Check two separate YouTube signals: whether YouTube is receiving your video input, and whether the viewer-facing broadcast is actually live. The YouTube Live Streaming API exposes these as a liveStream resource and a liveBroadcast resource. A stream marked active confirms incoming data; it does not, by itself, confirm the broadcast is live for viewers.
What “online” means for a YouTube live stream
YouTube models the incoming feed and the event viewers watch as different resources. Its liveStream documentation describes the feed transmitted to YouTube. Its liveBroadcast documentation describes the event streamed to viewers.
| Signal | What it answers | What to inspect |
|---|---|---|
| Incoming stream | Is YouTube receiving data from the encoder or automated service? | liveStream.status.streamStatus and liveStream.status.healthStatus |
| Viewer-facing broadcast | What lifecycle state is the event in? | The associated liveBroadcast lifecycle status |
For a meaningful health check, inspect both resources and report their results separately—for example, “input received; broadcast not live” rather than a single ambiguous “online” label.
Interpret the incoming stream status
The stream’s status.streamStatus reports YouTube’s state for the incoming feed. The documented values are:
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active: YouTube is receiving data via the stream. This confirms input receipt, not that the broadcast is in the expected viewer-facing state.inactive: YouTube is not receiving data.error: An error condition exists.ready: The stream has valid CDN settings.created: The stream has been created but does not have valid CDN settings.
Do not treat ready as live input: it describes valid settings, whereas active indicates that data is being received.
Use health status to diagnose quality or configuration problems
The stream’s status.healthStatus adds diagnostic context beyond whether input is active. YouTube documents these values:
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good: No configuration issue has warning severity or worse.ok: No issue has error severity.bad: One or more issues have error severity.noData: YouTube’s live-streaming backend has no health-status information.
The health object also includes the time of its most recent update as a UNIX timestamp and any configuration issues YouTube reports. Issue details can include type, severity, reason, and description. Documented examples include low video bitrate, a frame-rate mismatch, and missing audio. Treat noData as unavailable diagnostic information, not as proof that the feed is healthy.
Check the broadcast viewers are meant to see
Find the expected liveBroadcast and inspect its lifecycle status independently of the stream. The broadcast resource includes a bound stream ID; use that ID to identify the corresponding liveStream and read its status. This association matters when a channel has multiple events or inputs: checking an unrelated active stream would not verify the intended broadcast.
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Use the broadcast’s lifecycle state to answer whether the event is in the expected state for viewers. Do not infer that state solely from an active input stream.
Read the resources with the YouTube Live Streaming API
- Authorize access. Listing broadcasts requires OAuth authorization. The broadcasts list method documents scopes including
https://www.googleapis.com/auth/youtube.readonly, as well as YouTube and YouTube force-SSL scopes. Keep OAuth credentials private. - Find the intended broadcast. The list method accepts
broadcastStatusvaluesactive,all,completed, andupcoming. It requires exactly one ofbroadcastStatus,id, ormine. Usemine=trueto limit results to broadcasts owned by the authenticated user. - Match its bound stream. Read the broadcast’s bound stream ID, then retrieve that
liveStreamresource. Make sure the resource you inspect is the one associated with the event you intend to monitor. - Evaluate each result separately. Report input as received when
streamStatusisactive; report broadcast status from the broadcast’s own lifecycle state; include health status and any reported issues for diagnosis. - Handle access and service errors explicitly. An account not enabled for live video may receive
liveStreamingNotEnabled. Surface authorization or API errors as monitoring failures rather than silently classifying the stream as offline or healthy.
The API’s broadcast transition method changes broadcast state; it is not a passive health check. YouTube documents that the bound stream must be active before transitioning a broadcast to testing or live. Do not call a transition endpoint merely to find out whether the event is online.
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Choose checks and alerts without assuming a universal interval
The API references establish resource states, but they do not prescribe a universal polling interval, detection latency, or quota budget for a monitoring system. Choose a polling and retry policy for your own operational needs, then verify current API quota documentation and validate the implementation before relying on it. Avoid describing an alert as instantaneous unless your system has been measured under the conditions that support that claim.
- Alert separately when the intended input is not active and when the intended broadcast is not in its expected lifecycle state.
- Use health issues to help distinguish an input/configuration problem from a broadcast-state problem.
- Record the resource IDs, observed statuses, health update timestamp, and time your monitor made the check so an operator can investigate transitions and stale data.
- Protect OAuth tokens and avoid exposing stream keys or credentials in logs and alerts.
Common monitoring mistakes
- Calling an active input “live.”
activemeans YouTube is receiving data. Check the broadcast lifecycle separately. - Checking the wrong stream. Match the broadcast’s bound stream ID rather than selecting an arbitrary active input.
- Treating readiness as receipt.
readymeans valid CDN settings; it does not mean data is arriving. - Ignoring health details. An active feed can still have reported configuration issues. Read the health object and issue descriptions.
- Using a state-changing endpoint as a probe. A transition call changes the broadcast; use resource reads for monitoring.
- Reporting missing API data as a healthy result. Distinguish authorization errors, unavailable health information, and actual stream states in your monitor output.
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